| Member | Family Name | Given Name | Known As | YoB | Eligibility Category | Ranked Club |
|---|---|---|---|---|---|---|
| 1720535 | Thomas | Aanya | Aanya | 2012 | Female | Northampton Swimming Club |
| 266459 | Thomas | Aaron | Aaron | Open/Male | ||
| 370687 | Thomas | Aaron | Aaron | 1992 | Open/Male | Bridgend County Swim Squad |
| 1279207 | Thomas | Aaron | Aaron | Open/Male | Boston Amateur SC | |
| 1360152 | Thomas | Aaron | Aaron | 2006 | Open/Male | Seabyrd SC |
| 1387355 | Thomas | Aaron | Aaron | 2007 | Open/Male | Wycombe District SC |
| 919142 | Thomas | Abbie | Abbie | 2001 | Female | Bridgend County Swim Squad |
| 1139409 | Thomas | Abbie | Abbie | Female | Biddulph SC | |
| 1216847 | Thomas | Abbie | Abbie | 2005 | Female | Erith & District SC |
| 9999930727 | Thomas | Abigail | Abigail | Female | ||
| 771589 | Thomas | Abigail | Abby | Female | Ashton Central SC | |
| 957422 | Thomas | Abigail | Abigail | 2005 | Female | Neath ASC |
| 1102997 | Thomas | Abigail | Abigail | Female | City of Linc Pentaqua SC | |
| 1212153 | Thomas | Abigail | Abigail | 2006 | Female | Pembroke & District ASC |
| 90004007 | Thomas | Abigail | Abigail | Female | Nairn ASC | |
| 529220 | Thomas | Adam | Adam | Open/Male | City Of Rochester S&LGC | |
| 767034 | Thomas | Adam | Adam | Open/Male | Northgate Bridgnorth SC | |
| 1271054 | Thomas | Adam | Adam | Open/Male | Runcorn Reps SC | |
| 1347375 | Thomas | Adam | Adam | Open/Male | Corsham A.S.C. | |
| 1460538 | Thomas | Adam | Adam | Open/Male | Midhurst & District SC | |
| 1490738 | Thomas | Adam | Adam | Open/Male | Kingfishers Scarborough SC | |
| 1613468 | Thomas | Adam | Adam | 2013 | Open/Male | Carn Brea and Helston SC |
| 961102 | Thomas | Addie | Addie | 2007 | Open/Male | Winchester City Penguins |
| 940361 | Thomas | Adrian | Tommo | Open/Male | Beachfield Swimming Squad | |
| 1320907 | Thomas | Adrian | Adrian | Open/Male | Streatham SC | |
| 1367808 | Thomas | Adriana | Adriana | Female | Boldon C.A. Swim Club | |
| 90029495 | Thomas | Aiden | Aiden | Open/Male | Menzieshill & Whitehall Swimming | |
| 470368 | Thomas | Aimee Louise | Aimee Louise | Female | ||
| 792729 | Thomas | Alan | Alan | Open/Male | Ashton Central SC | |
| 1123040 | Thomas | Alan | Alan | 1983 | Open/Male | Cardiff Masters |
| 1643570 | Thomas | Alana | Alana | Female | Chippenham ASC | |
| 142564 | Thomas | Alanna | Alanna | Female | Woking SC | |
| 543967 | Thomas | Alanya | Alanya | 2001 | Female | Tenby |
| 792965 | Thomas | Alastair | Alastair | 2000 | Open/Male | Cockermouth SC |
| 1372486 | Thomas | Albert | Bertie | Open/Male | Cheddar Kingfishers SC | |
| 1727178 | Thomas | Albie | Albie | Open/Male | Ware SC | |
| 1701491 | Thomas | Aleah | Aleah | Female | Kingsbury Aquarius SC | |
| 9999916627 | Thomas | Alec | Alec | Open/Male | ||
| 139049 | Thomas | Aled | Aled | 1993 | Open/Male | Llanelli |
| 1271710 | Thomas | Aled | Aled | 2004 | Open/Male | Llanelli |
| 1491671 | Thomas | Alejandra | Alejandra | 2009 | Female | Basingstoke Bluefins SC |
| 76717 | Thomas | Alex | Alex | 1995 | Open/Male | Bridgend County Swim Squad |
| 9999908505 | Thomas | Alex | Alex | Open/Male | ||
| 1291496 | Thomas | Alex | Alex | Open/Male | Sutton & Cheam SC | |
| 1361119 | Thomas | Alex | Alex | 2007 | Open/Male | Amman Valley |
| 1593817 | Thomas | Alex | Alex | Open/Male | Exeter City Swimming Club | |
| 1644812 | Thomas | Alex | Clare | Open/Male | Bristol North SC | |
| 1712985 | Thomas | Alex | Alex | Open/Male | Bromsgrove SC | |
| 1333069 | Thomas | Alexa | Alexa | Female | Chase SC | |
| 1649304 | Thomas | Alexa | Alexa | Female | Leander SC | |
| 65965 | Thomas | Alexander | Alexander | Open/Male | Radford SC | |
| 143655 | Thomas | Alexander | Alexander | Open/Male | Crawley SC | |
| 299089 | Thomas | Alexander | Alexander | Open/Male | ||
| 896450 | Thomas | Alexander | Alex | Open/Male | Forward Hillingdon Squad | |
| 90005681 | Thomas | Alexander | Alexander | 2007 | Open/Male | Orkney ASC |
| 1505128 | Thomas | Alexander | Alexander | Open/Male | Swindon Dolphin ASC | |
| 1528988 | Thomas | Alexander | Alex | 2011 | Open/Male | Beckenham SC |
| 9999906709 | Thomas | Alexandra | Alexandra | Female | ||
| 1389027 | Thomas | Alexandra | Alex | Female | Cheddar Kingfishers SC | |
| 1406533 | Thomas | Alexia | Alexia | Female | Bebington SC | |
| 370825 | Thomas | Alfie | Alfie | 1998 | Open/Male | Market Drayton SC |
| 1632495 | Thomas | Alfie | Alfie | Open/Male | Great Yarmouth SC | |
| 1699659 | Thomas | Alfred | Alfred | 2011 | Open/Male | Caradon SC |
| 53013 | Thomas | Alice | Alice | 1992 | Female | Newark SC |
| 257883 | Thomas | Alice | Alice | 1995 | Female | Yeovil District SC |
| 915984 | Thomas | Alice | Alice | 2005 | Female | Knutsford Amateur Swimming Club |
| 878092 | Thomas | Alice | Alice | Female | Barrow Long Distance SC | |
| 1482851 | Thomas | Alice | Alice | Female | Hackney Aquatics Club | |
| 1609616 | Thomas | Alice | Alice | 2010 | Female | Bradford-On-Avon ASC |
| 90041968 | Thomas | Alice | Alice | Female | Dunfermline ASC | |
| 1758757 | Thomas | Alice | Alice | Female | Lydney SC | |
| 1751995 | Thomas | Alila | Alila | 2013 | Female | Truro City SC |
| 1647014 | Thomas | Allegra | Allegra | 2011 | Female | Bristol Penguin Olympic SC |
| 97001783 | Thomas | Alun | Alun | 2013 | Open/Male | Clwb Nofio Caernarfon |
| 18712 | Thomas | Alys | Alys | 1990 | Female | City of Swansea Aquatics Club |
| 1135299 | Thomas | Alys | Alys | 2003 | Female | Llanelli |
| 1305569 | Thomas | Amalie | Amalie | 2006 | Female | Taunton Deane SC |
| 262234 | Thomas | Amanda | Amanda | 1964 | Female | Out to Swim London |
| 79287 | Thomas | Amber | Amber | Female | Hastings Seagull SC | |
| 1153591 | Thomas | Amber | Amber | 2006 | Female | Kingston Royals SC |
| 1454400 | Thomas | Amber | Amber | Female | Bradford Dolphin SC | |
| 908942 | Thomas | Amelia | Amelia | 1999 | Female | Poole SC |
| 969630 | Thomas | Amelia | Amelia | Female | Herne Bay L&SC | |
| 1213074 | Thomas | Amelia | Amelia | Female | Star Diving Club Guildford | |
| 1342891 | Thomas | Amelia | Amelia | Female | Newton Abbot Swimming and Water | |
| 1396332 | Thomas | Amelia | Amelia | Female | Fleetwood & District SC | |
| 1404971 | Thomas | Amelia | Amelia | 2008 | Female | Wycombe District SC |
| 1612813 | Thomas | Amelia | Amelia | 2010 | Female | Merthyr Tydfil Swimming Club |
| 1215165 | Thomas | Amelie | Amelie | 2005 | Female | Elmbridge Phoenix SC |
| 1373142 | Thomas | Amelie | Amelie | Female | Ashton Central SC | |
| 1374271 | Thomas | Amelie | Amelie | Female | Soundwell SC | |
| 1596505 | Thomas | Amelie | Amelie | 2013 | Female | Rhondda |
| 1676672 | Thomas | Amelie | Amelie | 2013 | Female | Wycombe District SC |
| 1469143 | Thomas | Amira | Amira | 2012 | Female | Nexus Valleys Swimming Club |
| 23066 | Thomas | Amy | Amy | 1988 | Female | Reading SC |
| 59304 | Thomas | Amy | Amy | Female | Aberavon Swimming Club | |
| 9999920963 | Thomas | Amy | Amy | Female | ||
| 528919 | Thomas | Amy | Amy | Female | Maxwell SC | |
| 955512 | Thomas | Amy | Amy | 2002 | Female | Bridgend County Swim Squad |
| 1182942 | Thomas | Amy | Amy | 2005 | Female | St Austell ASC |
| 1485759 | Thomas | Amy | Amy | Female | Horncastle Otters SC | |
| 458110 | Thomas | Amy Rebecca | Amy Rebecca | 1993 | Female | Penyrheol ASC |
| 9999915928 | Thomas | Amy-Jo | Amy-Jo | Female | ||
| 1260539 | Thomas | Amy-Rose | Amy-Rose | Female | North Norfolk Vikings SC | |
| 1295382 | Thomas | Anabel | Anabel | 2007 | Female | Flitwick Dolphins SC |
| 1663178 | Thomas | Anahi | Arlo | Female | Broomfield Park SC | |
| 1380115 | Thomas | Anastasia | Anastasia | 2008 | Female | Amman Valley |
| 1335414 | Thomas | Andrea | Andrea | Female | Woodchurch SC | |
| 2634 | Thomas | Andrew | Andrew | Open/Male | Warwick Water Polo Club | |
| 352079 | Thomas | Andrew | Andrew | 1996 | Open/Male | Rugby SC |
| 9999928408 | Thomas | Andrew | Andrew | Open/Male | ||
| 90865 | Thomas | Andrew | Andy | 1965 | Open/Male | Asa Temporary cat 2 club |
| 9999929821 | Thomas | Andy | Andy | Open/Male | ||
| 1696303 | Thomas | Angelina | Angelina | Female | Exeter City Swimming Club | |
| 486825 | Thomas | Angharad | Angharad | 1998 | Female | Carn Brea and Helston SC |
| 1459940 | Thomas | Angharad | Angharad | 2010 | Female | Fishguard Flyers |
| 1453033 | Thomas | Ann | Ann Mary | Female | Douglas SC | |
| 1423747 | Thomas | Anna | Anna | 2008 | Female | Cheltenham S & W P Club |
| 1348035 | Thomas | Anna | Anna | Female | Kings Langley SC | |
| 1386519 | Thomas | Anna | Anna | Female | Romsey & Totton SC | |
| 1504686 | Thomas | Anna | Anna | Female | Stretford SC | |
| 1528977 | Thomas | Anna | Anna | 2014 | Female | Beckenham SC |
| 1655863 | Thomas | Anna | Anna | Female | Bristol Henleaze SC | |
| 1422721 | Thomas | Annabell | Annabell | Female | Blyth Lifeguard & Swimming Club | |
| 493987 | Thomas | Annabelle | Annabelle | Female | Ruislip Northwood Masters SC | |
| 1329497 | Thomas | Annabelle | Annabelle | Female | Guisborough SC | |
| 1470756 | Thomas | Annabelle | Annabelle | Female | Stockton ASC | |
| 14782 | Thomas | Anne | Anne | 1952 | Female | Kenilworth Masters SC |
| 141938 | Thomas | Anneka | Anneka | 1997 | Female | Pontypridd Swimming Club |
| 535077 | Thomas | Annie | Annie | 1999 | Female | Luton Diving Club |
| 441820 | Thomas | Annie-Rose | Annie-Rose | 1995 | Female | |
| 9999911071 | Thomas | Anoushka | Anoushka | Female | ||
| 1737256 | Thomas | Anthony | Anthony | Open/Male | West Kirby ASC | |
| 1120646 | Thomas | Anwen | Anwen | 2003 | Female | Anaconda SC |
| 906311 | Thomas | Anya | Anya | 2002 | Female | Cardiff Metropolitan University |
| 1274544 | Thomas | Arabella | Arabella | 2006 | Female | Amman Valley |
| 97001672 | Thomas | Aranli | Aranli | 1980 | Open/Male | Nofio Cymru |
| 1345217 | Thomas | Archie | Archie | Open/Male | Highworth ASC | |
| 1383304 | Thomas | Archie | Archie | 2008 | Open/Male | Henley SC |
| 1402270 | Thomas | Archie | Arch | Open/Male | Cheshunt Swimming Club | |
| 1515095 | Thomas | Archie | Archie | 2010 | Open/Male | City of Cardiff |
| 1635965 | Thomas | Archie | Archie | Open/Male | Amersham SC | |
| 1270163 | Thomas | Aris | Aris | 2003 | Open/Male | Camp Hill SC |
| 1663175 | Thomas | Arlo | Arlo | Open/Male | Broomfield Park SC | |
| 1751994 | Thomas | Arlo | Arlo | 2015 | Open/Male | Truro City SC |
| 1756229 | Thomas | Arlo | Arlo | Open/Male | Haringey Aquatics | |
| 1232748 | Thomas | Arly | Arly | Open/Male | Rainhill & District SC | |
| 1427160 | Thomas | Arthwr | Arthwr | 2007 | Open/Male | Abergavenny Swimming Club |
| 88946 | Thomas | Ashley | Ashley | Open/Male | ||
| 821051 | Thomas | Ashley | Ash | 1991 | Open/Male | Lydney SC |
| 1179693 | Thomas | Ashley | Ashley | Open/Male | Hastings Seagull SC | |
| 919421 | Thomas | Ashley | Ashley | 2004 | Female | Rhondda Cynon Taf Performance Sw |
| 1525086 | Thomas | Ashton | Ashton | 2015 | Open/Male | Medway Maritime Swimming Club |
| 1418849 | Thomas | Astrid | Astrid | Female | Eastbourne SC | |
| 1715105 | Thomas | Aubyn | Aubyn | Open/Male | Beacon SC | |
| 1256561 | Thomas | Ava | Ava | 2007 | Female | City of Cardiff |
| 1368518 | Thomas | Ava | Ava | Female | North Norfolk Vikings SC | |
| 1381734 | Thomas | Ava | Ava | Female | Reading SC | |
| 1618102 | Thomas | Ava | Ava | 2011 | Female | Rugby SC |
| 1697532 | Thomas | Ava | Ava | 2009 | Female | Epsom District SC |
| 1258982 | Thomas | Ayan | Ayan | 2008 | Open/Male | Sedgefield Water Polo Club |
| 90043968 | Thomas | Ayden | Ayden | Open/Male | Swim-IT | |
| 1156005 | Thomas | Ayesha | Ayesha | Female | Armthorpe & District SC | |
| 1717057 | Thomas | Ayesha | Ayesha | 2014 | Female | Doncaster Dartes SC |
| 1433242 | Thomas | Ayse | Ayse | Female | Fleetwood & District SC | |
| 1426676 | Thomas | Barney | Barney | 2008 | Open/Male | City of Bristol SC |
| 889301 | Thomas | Beca | Becca | 2001 | Female | Amman Valley |
| 1512399 | Thomas | Bella | Bella | Female | Leatherhead SC | |
| 1751230 | Thomas | Bella | Bella | Female | Kingsbury Aquarius SC | |
| 2141 | Thomas | Bem | Bem | Open/Male | ||
| 353515 | Thomas | Ben | Ben | Open/Male | Otter SC | |
| 76720 | Thomas | Ben | Ben | Open/Male | ||
| 1264626 | Thomas | Ben | Ben | Open/Male | Bury and Elton SC | |
| 1380623 | Thomas | Ben | Ben | 2006 | Open/Male | Soundwell SC |
| 614560 | Thomas | Ben | Ben | 1982 | Open/Male | City of St Albans SC |
| 88708 | Thomas | Benjamin | Benjamin | Open/Male | ||
| 320415 | Thomas | Benjamin | Ben | 1991 | Open/Male | South West Disability Swim Squad |
| 522418 | Thomas | Benjamin | Benjamin | Open/Male | Stockport Metro SC | |
| 1234410 | Thomas | Benjamin | Ben | 2010 | Open/Male | Borough Of Stockton Swim Scheme |
| 1419600 | Thomas | Benjamin | Ben | 2009 | Open/Male | Satellite of Macclesfield SC |
| 1394560 | Thomas | Benjamin | Ben | 2009 | Open/Male | Ulverston SC |
| 1426381 | Thomas | Benjamin | Benjamin | Open/Male | Epsom District SC | |
| 1476022 | Thomas | Benjamin | Benjamin | Open/Male | Torquay Leander SC | |
| 1508770 | Thomas | Benjamin | Benjamin | Open/Male | Exeter City Swimming Club | |
| 1510957 | Thomas | Benjamin | Ben | 2011 | Open/Male | Droitwich Dolphins SC |
| 960018 | Thomas | Beth | Beth | 2002 | Female | Biggleswade SC |
| 1625106 | Thomas | Beth | Beth | Female | Felixstowe SC | |
| 30949 | Thomas | Bethan | Bethan | Female | Swansea University | |
| 9999931134 | Thomas | Bethan | Bethan | Female | ||
| 76498 | Thomas | Bethan | Bethan | Female | Rhyl Dolphins SC | |
| 841056 | Thomas | Bethan | Beth | 2001 | Female | Derby Excel Swimming Club |
| 1137188 | Thomas | Bethan | Bethan | 2004 | Female | Daventry Dolphins SC |
| 1371139 | Thomas | Bethan | Bethan | Female | Crystal Palace Diving Club | |
| 1402559 | Thomas | Bethan | Bethan | Female | Romsey & Totton SC | |
| 1494242 | Thomas | Bethan | Bethan | Female | Crediton & District SC | |
| 1518735 | Thomas | Bethan | Bethan | 2008 | Female | Borough of Barnsley SC |
| 90039149 | Thomas | Bethan Rose | Bethan Rose | Female | Nairn Synchro SC | |
| 35223 | Thomas | Bethannie | Bethannie | 1992 | Female | Hatfield SC |
| 233766 | Thomas | Bethany | Bethany | 1996 | Female | Radford SC |
| 364003 | Thomas | Bethany | Bethany | 1995 | Female | Soundwell SC |
| 559531 | Thomas | Bethany | Bethany | Female | City of Derby Swimming Club | |
| 1111913 | Thomas | Bethany | Bethany | 2002 | Female | Nairn Synchro SC |
| 1356653 | Thomas | Bethany | Bethany | 2007 | Female | Wellington (Telford) SC |
| 1359159 | Thomas | Bethany | Bethany | 2004 | Female | Merthyr Tydfil Swimming Club |
| 1485890 | Thomas | Beti Mai | Beti Mai | 2010 | Female | Clwb Nofio P.B.P. |
| 1308390 | Thomas | Betsi | Betsi | 2007 | Female | City of Swansea Aquatics Club |
| 1132229 | Thomas | Beverley | Beverley | Female | Barrow Long Distance SC | |
| 1242623 | Thomas | Bianca | Bianca | Female | Cheltenham S & W P Club | |
| 1575491 | Thomas | Blake | Blake | 2012 | Open/Male | Leatherhead SC |
| 1483358 | Thomas | Bleddyn | Bleddyn | 2008 | Open/Male | Swansea Water Polo |
| 1461990 | Thomas | Bobby | Bobby | 2012 | Open/Male | Aberavon Swimming Club |
| 1606595 | Thomas | Bobby | Babby | 2013 | Open/Male | Redditch SC |
| 1166729 | Thomas | Bradley | Bradley | 2005 | Open/Male | Bilston SC |
| 741717 | Thomas | Bradley | Brad | 1996 | Open/Male | Matlock Water Polo Club |
| 1448845 | Thomas | Brandon-Lee | Brandon | Open/Male | Stourbridge SC | |
| 97005552 | Thomas | Bridi | Bridi | 2015 | Female | Rhondda Cynon Taf Performance Sw |
| 1709204 | Thomas | Brigid | Brigid | 2003 | Female | City of Sheffield Diving Club |
| 1364951 | Thomas | Brion | Brion | 2008 | Open/Male | Penyrheol ASC |
| 1243948 | Thomas | Bronte | Bronte | Female | Tigers SC (Jersey) Ltd | |
| 70721 | Thomas | Bryn | Bryn | Open/Male | Cults Otters ASC | |
| 1699865 | Thomas | Bryn | Bryn | Open/Male | Plymouth Leander SC | |
| 1591739 | Thomas | Byron | Byron | Open/Male | Leatherhead SC | |
| 1408834 | Thomas | Cafan | Cafan | 2010 | Open/Male | Clwb Nofio Caernarfon |
| 1166116 | Thomas | Cai | Cai | Open/Male | Forward Hillingdon Squad | |
| 1348545 | Thomas | Cai | Cai | 2006 | Open/Male | Clwb Nofio Bangor Swim Club |
| 1424382 | Thomas | Cai | Cai | Open/Male | Farnham SC | |
| 1445800 | Thomas | Cai | Cai | 2014 | Open/Male | Aberavon Swimming Club |
| 956014 | Thomas | Caitlin | Caitlin | 2004 | Female | Burton Amateur SC |
| 1379806 | Thomas | Caitlin | Caitlin | 2008 | Female | Penyrheol ASC |
| 90013121 | Thomas | Caitlin | Caitlin | Female | Kingston ASC | |
| 1343243 | Thomas | Caitlyn | Caitlyn | 2009 | Female | Neath ASC |
| 1616430 | Thomas | Caleb | Caleb | Open/Male | Bournemouth SC | |
| 142578 | Thomas | Callum | Callum | 1995 | Open/Male | Woking SC |
| 741718 | Thomas | Callum | Callum | 1998 | Open/Male | Matlock Water Polo Club |
| 778154 | Thomas | Callum | Callum | 1998 | Open/Male | Gloucester City SC |
| 1105953 | Thomas | Callum | Callum | Open/Male | Wroughton ASC | |
| 1133118 | Thomas | Callum | Callum | Open/Male | Sevenoaks SC | |
| 1209443 | Thomas | Callum | Callum | 2006 | Open/Male | Kingston ASC |
| 1256576 | Thomas | Callum | Callum | 2003 | Open/Male | Nofio Cymru |
| 1500161 | Thomas | Callum | Callum | Open/Male | Salisbury Stingrays SC | |
| 1677947 | Thomas | Callum | Callum | 2010 | Open/Male | Grantham Water Polo Club |
| 53586 | Thomas | Cameron | Cameron | Open/Male | Tredegar Torpedoes | |
| 910688 | Thomas | Cameron | Cameron | Female | Ealing SC | |
| 1344349 | Thomas | Cameron | Cameron | 2007 | Open/Male | Neath ASC |
| 90014406 | Thomas | Cameron | Cameron | 2000 | Open/Male | Bo'ness ASC |
| 1708698 | Thomas | Cameron | Cameron | Open/Male | Tonbridge SC | |
| 197720 | Thomas | Camille | Camille | Female | ||
| 1296235 | Thomas | Cara | Cara | 2007 | Female | Doncaster Dartes SC |
| 1449073 | Thomas | Cara | Cara | 2009 | Female | Llanelli |
| 32843 | Thomas | Cari | Cari | Female | ||
| 9999907847 | Thomas | Carl | Carl | Open/Male | ||
| 665343 | Thomas | Carl | Carl | Open/Male | Nantwich Seals Swimming Club | |
| 39405 | Thomas | Caroline | Caroline | Female | ||
| 1184208 | Thomas | Caroline | Caroline | 1979 | Female | Chippenham ASC |
| 908424 | Thomas | Caroline | Caroline | 1963 | Female | Clevedon SC |
| 9999915500 | Thomas | Carrie | Carrie | Female | ||
| 56634 | Thomas | Carys | Carys | 1997 | Female | Cardiff Masters |
| 498536 | Thomas | Carys | Carys | 1998 | Female | Pembrokeshire County Swimming |
| 973363 | Thomas | Carys | Carys | 2003 | Female | Cockermouth SC |
| 1193583 | Thomas | Carys | Carys | 2002 | Female | Barry ASC |
| 1328090 | Thomas | Carys | Carrie | 2008 | Female | Daventry Dolphins SC |
| 1484306 | Thomas | Carys | Carys | 2011 | Female | Penyrheol ASC |
| 1597056 | Thomas | Carys | Carys | 2012 | Female | Northampton Swimming Club |
| 1248749 | Thomas | Carys-Marie | Carys-Marie | 2005 | Female | Newbury Swimming Club |
| 1486018 | Thomas | Cassie | Cassie | 2008 | Female | Sutton In Ashfield SC |
| 1618671 | Thomas | Cassie | Cassie | 2008 | Female | Sutton In Ashfield SC |
| 1667866 | Thomas | Cassie | Cassie | Female | Plymouth Leander SC | |
| 63145 | Thomas | Catherine | Catherine | 1994 | Female | Yeovil District SC |
| 9999930164 | Thomas | Catherine | Catherine | Female | ||
| 1223062 | Thomas | Catherine | Catherine | Female | Guildford City Swimming Club | |
| 144295 | Thomas | Catrin | Catrin | 1997 | Female | City of Swansea Aquatics Club |
| 161638 | Thomas | Catrin | Catrin | 1996 | Female | Llandarcy ASC |
| 821736 | Thomas | Catrin | Catrin | 2002 | Female | |
| 1234536 | Thomas | Catrin | Catrin | 2005 | Female | City of Swansea Aquatics Club |
| 97000941 | Thomas | Catrin | Catrin | 2014 | Female | Pontypridd Swimming Club |
| 145413 | Thomas | Catriona | Catriona | 1996 | Female | Clwb Nofio Bangor Swim Club |
| 90037535 | Thomas | Catriona | Catriona | Female | Menzieshill & Whitehall Swimming | |
| 1732404 | Thomas | Celeste | Celeste | Female | Amersham SC | |
| 1710621 | Thomas | Celia | Celia | Female | Kingston Royals SC | |
| 869719 | Thomas | Celyn | Celyn | 1998 | Female | Fishguard Flyers |
| 954255 | Thomas | Celyn | Celyn | 2004 | Female | Carmarthen |
| 1483325 | Thomas | Celyn | Celyn | 2008 | Female | Nofio Sir Gar |
| 56299 | Thomas | Ceri | Ceri | 1965 | Female | Bridgend Swim Club |
| 805232 | Thomas | Ceri | Ceri | 2003 | Female | City Of Newport Swimming & Water |
| 1114497 | Thomas | Ceri | Ceri | 2002 | Female | City of Chester Swimming Club |
| 1261119 | Thomas | Cerys | Cerys | 2005 | Female | Adwick (Doncaster) SC |
| 1324140 | Thomas | Cerys | Cerys | 2009 | Female | Wyre Forest SC |
| 1383557 | Thomas | Cerys | Cerys | 2008 | Female | Denbigh Dragons Swim Club |
| 1486889 | Thomas | Cerys | Cerys | 2009 | Female | Carmarthen |
| 1548431 | Thomas | Cerys | Cerys | 2011 | Female | Nofio Sir Gar |
| 1753384 | Thomas | Cerys | Cerys | Female | Tigers SC (Jersey) Ltd | |
| 324541 | Thomas | Cerys-Anne | Cerys-Anne | Female | City of Cardiff | |
| 1641746 | Thomas | Chantal | Chantal | Female | Saxon Crown (Lewisham) SC | |
| 149610 | Thomas | Chantelle | Chantelle | Female | ||
| 1590818 | Thomas | Charis | Charis | Female | Brent Dolphins SC | |
| 9999920200 | Thomas | Charles | Charles | Open/Male | ||
| 1324975 | Thomas | Charles | Charles | Open/Male | Henley SC | |
| 1438668 | Thomas | Charles | Charlie | 2008 | Open/Male | Celtic Dolphins |
| 1635785 | Thomas | Charles | Charlie | 2012 | Open/Male | Louth Dolphins SC |
| 1724688 | Thomas | Charles | Charles | Open/Male | Trafford Metro Bor SC | |
| 186815 | Thomas | Charlie | Charlie | Open/Male | Market Drayton SC | |
| 354092 | Thomas | Charlie | Charlie | 1996 | Open/Male | Kettering Amateur Swimming Club |
| 1212040 | Thomas | Charlie | Charlie | 2005 | Open/Male | Celtic Dolphins |
| 1319483 | Thomas | Charlie | Charlie | 2007 | Open/Male | Bletchley and District SC |
| 1357531 | Thomas | Charlie | Charlie | Open/Male | Paignton SC | |
| 870782 | Thomas | Charlie | Charlie | Open/Male | Swinton SC | |
| 1442880 | Thomas | Charlie | Charlie | Open/Male | Leamington Spa SC | |
| 1477556 | Thomas | Charlie | Charlie | Open/Male | Wellington (Telford) SC | |
| 1687022 | Thomas | Charlie | Charlie | Open/Male | Bor of Waltham Forest (Gators) | |
| 366637 | Thomas | Charlotte | Charlotte | 1995 | Female | Alton & District Swimming Club |
| 9999903399 | Thomas | Charlotte | Charlotte | Female | ||
| 806991 | Thomas | Charlotte | Charlotte | Female | Okehampton Otters SC | |
| 1102993 | Thomas | Charlotte | Charlotte | 2003 | Female | City of Linc Pentaqua SC |
| 897948 | Thomas | Charlotte | Charlotte | Female | ||
| 1336275 | Thomas | Charlotte | Charlotte | Female | Sid Vale SC | |
| 1376334 | Thomas | Charlotte | Charlotte | Female | Crawley Diving Club | |
| 1398278 | Thomas | Charlotte | Charlotte | Female | Cannock Phoenix Swimming Club | |
| 1474908 | Thomas | Charlotte | Lottie | 2009 | Female | Isle of Man Swimming Club |
| 1690521 | Thomas | Charlotte | Charlotte | Female | City of Coventry SC | |
| 1751290 | Thomas | Charlotte | Charlotte | Female | Verulam ASC | |
| 464000 | Thomas | Chelsi | Chelsi | Female | Exeter City Swimming Club | |
| 1629976 | Thomas | Chenae | Chenae | 2013 | Female | Leighton Buzzard SC |
| 1738891 | Thomas | Chester | Chester | Open/Male | Bradford-On-Avon ASC | |
| 18093 | Thomas | Chloe | Chloe | Female | City of Linc Pentaqua SC | |
| 33780 | Thomas | Chloe | Chloe | Female | ||
| 787915 | Thomas | Chloe | Chloe | 1999 | Female | Bishops Waltham Mitres SwimClub |
| 811163 | Thomas | Chloe | Chloe | 1998 | Female | Chelsea & Westminster SC |
| 852978 | Thomas | Chloe | Chloe | 1999 | Female | Holywell Swimming Club |
| 824119 | Thomas | Chloe | Chloe | 1998 | Female | Bridgend County Swim Squad |
| 1225906 | Thomas | Chloe | Chloe | 2006 | Female | Rhyl Dolphins SC |
| 1328014 | Thomas | Chloe | Choe | Female | Godalming ASC | |
| 1330289 | Thomas | Chloe | Chloe | 2009 | Female | Fishguard Flyers |
| 1500167 | Thomas | Chloe | Chloe | Female | Salisbury Stingrays SC | |
| 1756044 | Thomas | Chloe | Chloe | Female | Romiley Marina Swimming Club | |
| 319156 | Thomas | Chris | Chris | Open/Male | Manchester Sharks WPC | |
| 9999920305 | Thomas | Chris | Chris | Open/Male | ||
| 9999929822 | Thomas | Chris | Chris | Open/Male | ||
| 735737 | Thomas | Christine | Christine | Female | Ruislip Northwood Masters SC | |
| 928345 | Thomas | Christopher | Chris | 2006 | Open/Male | Dinnaton SC |
| 1385360 | Thomas | Christopher | Christopher | 1966 | Open/Male | Asa Temporary cat 2 club |
| 1617409 | Thomas | Christopher | Christopher | Open/Male | Linslade Crusaders Swimming Club | |
| 1621667 | Thomas | Christopher | Christopher | 2012 | Open/Male | Black Lion SC |
| 1637112 | Thomas | Christopher | Chris | Open/Male | Hampstead Heath Winter SC | |
| 1691973 | Thomas | Christopher | Chris | 2009 | Open/Male | Aqua Force Swimming Academy Hart |
| 1251448 | Thomas | Cian | Cian | 2005 | Open/Male | Nofio Gwynedd Performance |
| 1172890 | Thomas | Ciara | Ciara | Female | Accrington SC | |
| 760903 | Thomas | Ciaran | Ciaran | 2002 | Open/Male | Newcastle SwimTeam |
| 9999918280 | Thomas | Claire | Claire | Female | ||
| 477002 | Thomas | Claire | Claire | Female | Swindon Dolphin ASC | |
| 18513 | Thomas | Clare | Clare | Female | Basildon and Phoenix SC | |
| 1354370 | Thomas | Clarrie | Clarrie | 2008 | Female | City Of Milton Keynes |
| 1605049 | Thomas | Cleo | Cleo | Female | Streatham SC | |
| 1740487 | Thomas | Cobey | Cobey | Open/Male | Broadstairs Lifeguard & SC | |
| 1603696 | Thomas | Cole | Cole | 2012 | Open/Male | Carmarthen |
| 156400 | Thomas | Colwyn | Colwyn | Open/Male | East Anglian Swallow Tails | |
| 76747 | Thomas | Conner | Conner | 1992 | Open/Male | Bridgend County Swim Squad |
| 1744735 | Thomas | Connie | Connie | Female | White Cliffs (of Dover) Swimming | |
| 414166 | Thomas | Conor | Conor | Open/Male | Streatham SC | |
| 550815 | Thomas | Conor | Conor | 1995 | Open/Male | Neath ASC |
| 31708 | Thomas | Craig | Craig | 1991 | Open/Male | Afan Valley Swimming Club |
| 90284 | Thomas | Craig | Craig | Open/Male | ||
| 476955 | Thomas | Craig | Craig | 1994 | Open/Male | Invicta WPC |
| 51368 | Thomas | Curtis | Curtis | 1995 | Open/Male | |
| 528341 | Thomas | Curtis | Curtis | 1995 | Open/Male | Merthyr Tydfil Swimming Club |
| 97002178 | Thomas | Cyffin | Cyffin | 2012 | Open/Male | Clwb Nofio Caernarfon |
| 62684 | Thomas | Cyril | Cyril | Open/Male | ||
| 1613107 | Thomas | Dafi | Dafi | Open/Male | Star Diving Club Guildford | |
| 517348 | Thomas | Daisy | Daisy | 1999 | Female | Plymouth Leander SC |
| 775972 | Thomas | Daisy | Daisy | 2000 | Female | Borough of Wandsworth SA |
| 1233642 | Thomas | Daisy | Daisy | 2007 | Female | Barry ASC |
| 1435770 | Thomas | Daisy | Daisy | Female | Bicester Blue Fins SC | |
| 1516990 | Thomas | Daisy | Daisy | 2010 | Female | Warrington Warriors SC |
| 1625688 | Thomas | Daisy | Daisy | Female | Minehead & West Somerset SC | |
| 810944 | Thomas | Damian | Damian | 1998 | Open/Male | Llanelli |
| 9999916238 | Thomas | Damien | Damien | Open/Male | ||
| 1330190 | Thomas | Dan | Dan | Open/Male | Backwell SC | |
| 76011 | Thomas | Daniel | Daniel | 1997 | Open/Male | Great Britain Police |
| 191247 | Thomas | Daniel | Daniel | Open/Male | Halesowen SC | |
| 359816 | Thomas | Daniel | Daniel | 1997 | Open/Male | Llanelli |
| 10624 | Thomas | Daniel | Daniel | Open/Male | ||
| 61871 | Thomas | Daniel | Daniel | Open/Male | ||
| 89382 | Thomas | Daniel | Daniel | Open/Male | ||
| 9999800741 | Thomas | Daniel | Daniel | Open/Male | ||
| 9999918821 | Thomas | Daniel | Daniel | Open/Male | ||
| 536539 | Thomas | Daniel | Daniel | 1997 | Open/Male | Royal Navy SC |
| 727086 | Thomas | Daniel | Daniel | Open/Male | Blaydon & District SC | |
| 741480 | Thomas | Daniel | Daniel | 1998 | Open/Male | Warrington Warriors SC |
| 919512 | Thomas | Daniel | Daniel | 2004 | Open/Male | Carmarthen |
| 942860 | Thomas | Daniel | Daniel | 2002 | Open/Male | Haverfordwest |
| 1228566 | Thomas | Daniel | Dan | 2007 | Open/Male | Epsom District SC |
| 1260315 | Thomas | Daniel | Dan | 2008 | Open/Male | Worcester SC |
| 1444939 | Thomas | Daniel | Daniel | Open/Male | Jersey Long Distance | |
| 1525352 | Thomas | Daniel | Daniel | Open/Male | Marple SC | |
| 90044460 | Thomas | Daniel | Daniel | Open/Male | Menzieshill & Whitehall Swimming | |
| 1728604 | Thomas | Daniel | Daniel | Open/Male | Swindon ASC | |
| 1742771 | Thomas | Darcey | Darcey | 2013 | Female | Clevedon SC |
| 1617203 | Thomas | Darcie | Darcie | 2011 | Female | Dunstable SC |
| 1702374 | Thomas | Darcy | Darcy | Female | Weston-Super-Mare SC | |
| 78828 | Thomas | Darren | Darren | Open/Male | Andover Swimming & WP Club | |
| 1577377 | Thomas | Dave | Dave | 1976 | Open/Male | Asa Temporary cat 2 club |
| 1714437 | Thomas | Dave | Dave | Open/Male | Hart Swimming Club | |
| 23072 | Thomas | David | David | 1987 | Open/Male | Reading SC |
| 75843 | Thomas | David | David | Open/Male | ||
| 9999904833 | Thomas | David | David | Open/Male | ||
| 1306475 | Thomas | David | David | Open/Male | Stockton ASC | |
| 1328297 | Thomas | David | David | 2004 | Open/Male | City of Bristol SC |
| 1481987 | Thomas | David | David | 2004 | Open/Male | Leicester Sharks Swimming Club |
| 1315996 | Thomas | David | Jimmy | Open/Male | North Norfolk Vikings SC | |
| 1483802 | Thomas | David | David | 2005 | Open/Male | Consett SC |
| 1746919 | Thomas | David | Dave | 1986 | Open/Male | British Army |
| 317228 | Thomas | Debra | Debra | 1961 | Female | Royal Navy SC |
| 804570 | Thomas | Declan | Declan | Open/Male | Swindon Dolphin ASC | |
| 1261338 | Thomas | Delfina | Delfina | 2007 | Female | Tunbridge Wells Diving Club |
| 1358759 | Thomas | Delina | Delina | Female | Cheshunt Swimming Club | |
| 857668 | Thomas | Delphine | Delphine | Female | Liverpool Penguins SC | |
| 1309368 | Thomas | Dewi | Dewi | 2007 | Open/Male | Haverfordwest |
| 1497579 | Thomas | Dexter | Dexter | 2010 | Open/Male | Merthyr Tydfil Swimming Club |
| 1734196 | Thomas | Dexter | Dexter | Open/Male | Linslade Crusaders Swimming Club | |
| 255839 | Thomas | Diane | Diane | 1957 | Female | Brent Dolphins SC |
| 1635986 | Thomas | Diccon | Diccon | Open/Male | Amersham SC | |
| 9999913965 | Thomas | Dionne | Dionne | Female | ||
| 277781 | Thomas | Dominic | Dominic | 1999 | Open/Male | Radford SC |
| 507916 | Thomas | Dominic | Dominic | Open/Male | Tiverton SC | |
| 865156 | Thomas | Dominic | Dominic | Open/Male | Royal Wootton Bassett ASC | |
| 97005309 | Thomas | Dominic | Dominic | 2011 | Open/Male | Penyrheol ASC |
| 1314212 | Thomas | Donna | Donna | Female | Putteridge Swimming Club | |
| 1345172 | Thomas | Dorothy | Lula | Female | Southern I-O-M SC | |
| 838248 | Thomas | Dylan | Dylan | 2002 | Open/Male | Duns ASC |
| 1355413 | Thomas | Dylan | Dylan | 2006 | Open/Male | Denbighshire Development Team |
| 1480441 | Thomas | Dylan | Dylan | 2007 | Open/Male | Bridgend County Swim Squad |
| 1637469 | Thomas | Dylan | Dylan | Open/Male | St Ives SC | |
| 1661800 | Thomas | Dylan | Dylan | Open/Male | Sandwell Aquatics Club | |
| 97001145 | Thomas | Dylan | Dylan | 2011 | Open/Male | Aberystwyth and District Swimmin |
| 97005323 | Thomas | Dylan | Dylan | 2014 | Open/Male | Haverfordwest |
| 1484159 | Thomas | Eden | Eden | 2013 | Female | Neath ASC |
| 1457267 | Thomas | Edie | Edie | 2008 | Female | Bridgend County Swim Squad |
| 420392 | Thomas | Edward | Edward | 1997 | Open/Male | Alton & District Swimming Club |
| 786050 | Thomas | Edward | Eddie | 1998 | Open/Male | Ludlow Swimming Club |
| 1382429 | Thomas | Edward | Edward | 2009 | Open/Male | Leamington Spa SC |
| 1478217 | Thomas | Edward | Teddy | Open/Male | Kings Langley SC | |
| 1340805 | Thomas | Effy | Effy | Female | Leander SC | |
| 90028764 | Thomas | Eilidh | Eilidh | Female | Menzieshill & Whitehall Swimming | |
| 31957 | Thomas | Eilir | Eilir | 1993 | Female | Clwb Nofio Ynys Môn | Isle of An |
| 97003895 | Thomas | Elain Gwyn | Elain Gwyn | 2015 | Female | Clwb Nofio Caernarfon |
| 195577 | Thomas | Eleanor | Eleanor | Female | City of Stoke SC (Cosacss) | |
| 1337462 | Thomas | Eleanor | Ellie | 2005 | Female | Poole SC |
| 1588364 | Thomas | Eleanor | Eleanor | Female | Swindon Dolphin ASC | |
| 97005281 | Thomas | Eleanor | Eleanor | 2013 | Female | City Of Newport Swimming & Water |
| 1730820 | Thomas | Eleanor | Eleanor | 2015 | Female | Flixton SC |
| 1315998 | Thomas | Elen | Elen | 2006 | Female | North Norfolk Vikings SC |
| 1412198 | Thomas | Elen | Elen | 2007 | Female | Amman Valley |
| 7914 | Thomas | Elena | Elena | Female | Leamington Spa SC | |
| 905056 | Thomas | Eleri | Eleri | 2003 | Female | City Of Newport Swimming & Water |
| 1361800 | Thomas | Eleri | Eleri | Female | ASKA (Chester) Swimming Club | |
| 97005100 | Thomas | Eli | Eli | 2015 | Female | Aberystwyth and District Swimmin |
| 1623430 | Thomas | Elijah | Elijah | Open/Male | St Austell ASC | |
| 81687 | Thomas | Elin | Elin | 1995 | Female | Aberaeron SC |
| 498537 | Thomas | Elin | Elin | 2000 | Female | Fishguard Flyers |
| 1451152 | Thomas | Elin | Elin | 2008 | Female | Amman Valley |
| 1510791 | Thomas | Elin | Elin | 2009 | Female | Clwb Nofio Bangor Swim Club |
| 268745 | Thomas | Elinor | Elinor | Female | ||
| 1450048 | Thomas | Elis | Elis | Open/Male | Mansfield SC | |
| 928076 | Thomas | Elisabeth | Elisabeth | 2002 | Female | Clwb Nofio Ynys Môn | Isle of An |
| 1233651 | Thomas | Eliza | Eliza | Female | Exmouth Swimming & Lifesaving So | |
| 1752998 | Thomas | Eliza | Eliza | 2015 | Female | City of Leeds SC |
| 322077 | Thomas | Elizabeth | Elizabeth | 1998 | Female | Ledbury & Malvern SC |
| 9999909670 | Thomas | Elizabeth | Elizabeth | Female | ||
| 1386287 | Thomas | Elizabeth | Libby | Female | Portsmouth & District Artistic S | |
| 289511 | Thomas | Ella | Ella | Female | Out To Swim | |
| 483241 | Thomas | Ella | Ella | 1996 | Female | Neath ASC |
| 1189264 | Thomas | Ella | Ella | 1999 | Female | Sheerness SC & Lifeguard Corp |
| 1400781 | Thomas | Ella | Ella | 2008 | Female | Preseli Panthers |
| 1402276 | Thomas | Ella | Ella | Female | Cheshunt Swimming Club | |
| 1424812 | Thomas | Ella | Ella | 2010 | Female | Swim Bournemouth |
| 1453303 | Thomas | Ella | Ella | 2000 | Female | Redhill & Reigate SC |
| 1478637 | Thomas | Ella | Ella | Female | Southwell SC | |
| 1648293 | Thomas | Ella | Ella | 2014 | Female | Linslade Crusaders Swimming Club |
| 97001431 | Thomas | Ella-Rose | Ella-Rose | 2013 | Female | Llanelli |
| 43284 | Thomas | Ellen | Ellen | 1994 | Female | Guildford City Swimming Club |
| 758451 | Thomas | Ellen | Ellen | 2000 | Female | Knutsford Amateur Swimming Club |
| 236347 | Thomas | Ellie | Ellie | 1996 | Female | Sevenoaks SC |
| 273147 | Thomas | Ellie | Ellie | 1996 | Female | Dartford District SC |
| 888587 | Thomas | Ellie | Ellie | 2001 | Female | City Of Newport Swimming & Water |
| 906892 | Thomas | Ellie | Ellie | 2003 | Female | Carmarthen |
| 1179675 | Thomas | Ellie | Ellie | 2004 | Female | Redhill & Reigate SC |
| 1330892 | Thomas | Ellie | Ellie | 2004 | Female | Bracknell & Wokingham SC |
| 1470460 | Thomas | Ellie | Ellie | 2009 | Female | City of Leeds SC |
| 1484995 | Thomas | Ellie | Ellie | 2008 | Female | Nofio Clwyd |
| 1485758 | Thomas | Ellie | Ellie | Female | Horncastle Otters SC | |
| 249065 | Thomas | Elliot | Elliot | Open/Male | Cranleigh SC | |
| 1207668 | Thomas | Elliot | Isobel | Open/Male | Walsall Swim and Water Polo Club | |
| 1384550 | Thomas | Elliot | Elliot | Open/Male | Bridgefield SC | |
| 1714805 | Thomas | Elliot | Elliot | 2014 | Open/Male | Bradford SC |
| 1736553 | Thomas | Elliot | Elliot | 2015 | Open/Male | Truro City SC |
| 51302 | Thomas | Ellis | Ellis | 1992 | Open/Male | City of Cardiff |
| 1517615 | Thomas | Ellis | Ellis | 2011 | Open/Male | Torfaen Dolphins Performance |
| 1756177 | Thomas | Ellis | Ellis | Open/Male | Haringey Aquatics | |
| 938352 | Thomas | Ellymay | Ellymay | Female | Bradford-On-Avon ASC | |
| 1584957 | Thomas | Elodie | Elodie | 2014 | Female | Woking SC |
| 1318617 | Thomas | Eloise | Eloise | Female | Verulam ASC | |
| 1374157 | Thomas | Eloise | Eloise | Female | Haringey Aquatics | |
| 1436381 | Thomas | Eloise | Josephine | Female | Leander SC | |
| 1501419 | Thomas | Eloise | Eloise | 2008 | Female | Barnes SC |
| 1592933 | Thomas | Eloise | Eloise | Female | Crewe Flyers SC | |
| 1630550 | Thomas | Elsa | Elsa | Female | Kingston Royals SC | |
| 1657572 | Thomas | Elsa | Elsa | 2011 | Female | Swindon Dolphin ASC |
| 1390468 | Thomas | Elsie | Elsie | Female | Orion SC | |
| 1527094 | Thomas | Elsie | Elsie | Female | Minehead & West Somerset SC | |
| 1422677 | Thomas | Emalee | Emalee | Female | Blyth Lifeguard & Swimming Club | |
| 1302912 | Thomas | Emelia | Emelia | 2008 | Female | Verulam ASC |
| 1697162 | Thomas | Emilia | Emilia | 2008 | Female | Verulam ASC |
| 97005353 | Thomas | Emilia | Emilia | 2012 | Female | Newtown Swimming Club |
| 1241461 | Thomas | Emilie | Emmy | Female | Carn Brea and Helston SC | |
| 161646 | Thomas | Emily | Emily | Female | Llandarcy ASC | |
| 425930 | Thomas | Emily | Emily | 1999 | Female | Penyrheol ASC |
| 501746 | Thomas | Emily | Emily | Female | Ashton Central SC | |
| 887124 | Thomas | Emily | Emily | Female | Great Harwood Otters SC | |
| 897429 | Thomas | Emily | Emily | 2001 | Female | Anaconda SC |
| 777686 | Thomas | Emily | Emily | 2001 | Female | Sittingbourne & Milton SC |
| 940018 | Thomas | Emily | Emily | 2004 | Female | East Grinstead Swimming Club |
| 1250231 | Thomas | Emily | Emily | 2004 | Female | Holywell Swimming Club |
| 1435772 | Thomas | Emily | Molly | Female | Bicester Blue Fins SC | |
| 1446493 | Thomas | Emily | Emily | Female | Haslemere Swimming Club | |
| 1678966 | Thomas | Emily | Emily | 2006 | Female | Berkhamsted SC |
| 9999927344 | Thomas | Emma | Emma | Female | ||
| 514359 | Thomas | Emma | Emma | 2001 | Female | Caldicot Swimming Club |
| 757046 | Thomas | Emma | Emma | 2000 | Female | Perth City Swim Club |
| 757251 | Thomas | Emma | Emma | 1986 | Female | Hoylake SC |
| 803994 | Thomas | Emma | Emma | 1997 | Female | Dorking Swimming Club |
| 1192107 | Thomas | Emma | Emma | Female | Haslemere Swimming Club | |
| 1271275 | Thomas | Emma | Emma | 2005 | Female | City of Leeds SC |
| 90005910 | Thomas | Emma | Emma | 2002 | Female | Edinburgh Diving Club |
| 802937 | Thomas | Emme | Emme | 2000 | Female | City of Cardiff |
| 847211 | Thomas | Emyr | Emyr | 2001 | Open/Male | City Of Newport Swimming & Water |
| 97000771 | Thomas | Enlli | Enlli | 2013 | Female | Nexus Valleys Swimming Club |
| 851449 | Thomas | Erin | Erin | 2000 | Female | Bridgend County Swim Squad |
| 1191006 | Thomas | Erin | Erin | 2005 | Female | City of Cardiff |
| 1255085 | Thomas | Erin | Erin | 2006 | Female | Denbigh Dragons Swim Club |
| 1424027 | Thomas | Erin | Erin | Female | Cannock Phoenix Swimming Club | |
| 1319484 | Thomas | Erin | Erin | 2005 | Female | Bletchley and District SC |
| 1332517 | Thomas | Erin | Erin | 2009 | Female | Cannock Phoenix Swimming Club |
| 1613467 | Thomas | Erin | Erin | 2013 | Female | Carn Brea and Helston SC |
| 1378139 | Thomas | Esme | Esme | 2007 | Female | Bracknell & Wokingham SC |
| 1696395 | Thomas | Esme | Esme | Female | Exeter City Swimming Club | |
| 97005179 | Thomas | Esme | Esme | 2016 | Female | Merthyr Tydfil Swimming Club |
| 1435698 | Thomas | Esther | Esther | Female | Haringey Aquatics | |
| 351768 | Thomas | Ethan | Ethan | Open/Male | ||
| 1368993 | Thomas | Ethan | Ethan | 2005 | Open/Male | Pershore SC |
| 1447926 | Thomas | Ethan | Ethan | 2011 | Open/Male | Amman Valley |
| 1620742 | Thomas | Ethan | Ethan | 2013 | Open/Male | Banbury SC |
| 1648300 | Thomas | Ethan | Ethan | 2010 | Open/Male | Grantham Water Polo Club |
| 1337283 | Thomas | Etienne | Etienne | 2011 | Female | Paignton SC |
| 1233293 | Thomas | Euan | Euan | 2006 | Open/Male | Gloucester City SC |
| 1337828 | Thomas | Euan | Euan | Open/Male | Bristol Henleaze SC | |
| 1380970 | Thomas | Euan | Euan | Open/Male | Bristol Henleaze SC | |
| 1390820 | Thomas | Euan | Euan | Open/Male | Market Drayton SC | |
| 1460863 | Thomas | Eva | Eva | 2009 | Female | Flitwick Dolphins SC |
| 1728605 | Thomas | Eva | Daniel | Female | Swindon ASC | |
| 1591228 | Thomas | Eva-Mae | Eva-Mae | 2015 | Female | Leyland Barracudas Swimming Club |
| 972467 | Thomas | Evan | Evan | 2004 | Open/Male | Milford Haven |
| 1328387 | Thomas | Evan | Evan | 2007 | Open/Male | Celtic Dolphins |
| 1410686 | Thomas | Evan | Evan | Open/Male | Bridport Barracuda | |
| 1391363 | Thomas | Evan | Evan | Open/Male | Long Eaton SC | |
| 1665558 | Thomas | Evan | Evan | Open/Male | Guildford City Swimming Club | |
| 1750858 | Thomas | Evan Parri | Evan | Open/Male | Warrington Swimming Club | |
| 1512431 | Thomas | Evangelina | Eva | 2009 | Female | Rhondda Cynon Taf Performance Sw |
| 9999924598 | Thomas | Eve | Eve | Female | ||
| 1335790 | Thomas | Eve | Eve | Female | Reading SC | |
| 1387012 | Thomas | Eve | Eve | 2007 | Female | Tynemouth SC |
| 1350080 | Thomas | Evelyn | Evelyn | Female | Tigers SC (Jersey) Ltd | |
| 1450514 | Thomas | Evelyn | Evelyn | Female | Lewes SC | |
| 1663582 | Thomas | Evelyn | Evelyn | Female | Rugby SC | |
| 1742358 | Thomas | Evelyn | Evie | Female | West Dorset SC | |
| 1755808 | Thomas | Evelyn | Evelyn | Female | Leander SC | |
| 1149660 | Thomas | Evie | Evie | Female | Accrington SC | |
| 1297878 | Thomas | Evie | Evie | 2008 | Female | Heads of the Valleys |
| 1343656 | Thomas | Evie | Evie | 2010 | Female | Nexus Valleys Swimming Club |
| 1499343 | Thomas | Evie | Evie | 2011 | Female | Weymouth SC |
| 1170028 | Thomas | Evie-Beth | Evie-Beth | 2006 | Female | Eastbourne SC |
| 97004352 | Thomas | Evie-Brooke | Evie-Brooke | 2013 | Female | Newtown Swimming Club |
| 709494 | Thomas | Ewan | Ewan | 2001 | Open/Male | Peterhead ASC |
| 456570 | Thomas | Faith | Faith | 1996 | Female | Reading SC |
| 1312104 | Thomas | Faith | Faith | 2008 | Female | Cinderford & District SC |
| 1439124 | Thomas | Faith | Faith | Female | Cheddar Kingfishers SC | |
| 1365049 | Thomas | Fay | Fay | 2011 | Female | Carnforth & Dist Otters |
| 1401905 | Thomas | Faye | Faye | 2009 | Female | Tynemouth SC |
| 1617284 | Thomas | Faye | Faye | Open/Male | Seagulls Swimming Club | |
| 1689728 | Thomas | Felicity | Felicity | 2013 | Female | Weston-Super-Mare SC |
| 1515848 | Thomas | Felix | Felix | 2009 | Open/Male | Eaton Square SC |
| 678604 | Thomas | Fergus | Fergus | 1982 | Open/Male | Rugby SC |
| 540268 | Thomas | Ffion | Ffion | 2000 | Female | Tilehurst SC |
| 783585 | Thomas | Ffion | Ffion | 2002 | Female | Pontypridd Swimming Club |
| 1290600 | Thomas | Ffion | Ffion | 2007 | Female | Neath ASC |
| 1297774 | Thomas | Ffion | Ffion | 2006 | Female | Llanelli |
| 1450050 | Thomas | Ffion | Ffion | 2006 | Female | Mansfield SC |
| 1452008 | Thomas | Ffion | Ffion | 2009 | Female | Flint Swimming Club |
| 97003117 | Thomas | Ffion | Ffion | 2013 | Female | Llanelli |
| 1304932 | Thomas | Finlay | Finlay | Open/Male | Sandwell Aquatics Club | |
| 97000151 | Thomas | Finlay | Finlay | 2011 | Open/Male | Brecon |
| 1386291 | Thomas | Finley | Finley | Female | Andover Swimming & WP Club | |
| 908079 | Thomas | Finn | Finn | Open/Male | Southampton University WPC | |
| 1443937 | Thomas | Finn | Finn | 2014 | Open/Male | Northgate Bridgnorth SC |
| 1260588 | Thomas | Finnley | Finnley | 2003 | Open/Male | Cinderford & District SC |
| 1632855 | Thomas | Fletcher | Fletcher | Open/Male | Braunstone SC | |
| 1317114 | Thomas | Fleur | Fleur | 2005 | Female | Gainsborough Dolphins SC |
| 1457407 | Thomas | Flora | Flora | Female | Exmouth Swimming & Lifesaving So | |
| 1311314 | Thomas | Florence | Florence | Female | Winchester City Penguins | |
| 1666662 | Thomas | Florence | Florence | Female | City of Hereford SC | |
| 30837 | Thomas | Francesca | Francesca | Female | Llandarcy ASC | |
| 9999927508 | Thomas | Francesca | Francesca | Female | ||
| 981174 | Thomas | Francesca | Francesca | 2002 | Female | Killerwhales SC (Havering) |
| 1218819 | Thomas | Francesca | Frankie | 2004 | Female | Wrexham Swimming Club |
| 1629486 | Thomas | Francesca | Francesca | Female | Brighton SC | |
| 1681556 | Thomas | Frank | Frank | Open/Male | Gosport Dolphins SC | |
| 26141 | Thomas | Fred | Fred | Open/Male | Out to Swim London | |
| 1112095 | Thomas | Freddie | Freddie | Open/Male | Enfield Swim Squad | |
| 1319969 | Thomas | Freddie | Freddie | Open/Male | Keynsham SC | |
| 1427795 | Thomas | Freddie | Freddie | 2010 | Open/Male | Chester-Le-Street SC |
| 1424065 | Thomas | Freddy | Freddy | Open/Male | Cannock Phoenix Swimming Club | |
| 796735 | Thomas | Frederick | Freddie | Open/Male | Dawlish SC | |
| 1512381 | Thomas | Frederick | Frederick | 2009 | Open/Male | Deben SC |
| 1111520 | Thomas | Freya | Freya | 2001 | Female | Rugby SC |
| 1361868 | Thomas | Freya | Freya | 2006 | Female | Satellite of Macclesfield SC |
| 1375986 | Thomas | Freya | Freya | Female | Long Eaton SC | |
| 1382365 | Thomas | Freya | Freya | Female | Stretford SC | |
| 1402271 | Thomas | Freya | Frey | Female | Cheshunt Swimming Club | |
| 1336667 | Thomas | Freya | Freya | Female | Stretford SC | |
| 1444887 | Thomas | Freya | Freya | 2007 | Female | Bridgend Swim Club |
| 1620749 | Thomas | Freya | Ethan | 2015 | Female | Brackley Swimming Club |
| 1642200 | Thomas | Freya | Freya | 2011 | Female | Bridgwater Amateur Swimming Club |
| 1385480 | Thomas | Gabriel | Gabriel | 2006 | Open/Male | City of Sheffield WPC |
| 1506839 | Thomas | Gabriella | Gabriella | 2012 | Female | Chelsea & Westminster SC |
| 16193 | Thomas | Gareth | Gareth | 1988 | Open/Male | Shrewsbury SC |
| 31715 | Thomas | Gareth | Gareth | 1990 | Open/Male | Penarth Swimming and Water Polo |
| 36220 | Thomas | Gareth | Gareth | Open/Male | York City Baths Club | |
| 367264 | Thomas | Gareth | Gareth | 1999 | Open/Male | City of Swansea Aquatics Club |
| 6225 | Thomas | Gareth | Gareth | Open/Male | ||
| 9999916970 | Thomas | Gareth | Gareth | Open/Male | ||
| 9999922821 | Thomas | Gareth | Gareth | Open/Male | ||
| 248871 | Thomas | Gareth | Gareth | 1992 | Open/Male | Heart Of Midlothian ASC |
| 1313778 | Thomas | Gareth | Gareth | Open/Male | Shiverers SC | |
| 1414845 | Thomas | Gareth | Gareth | 1992 | Open/Male | Hoddesdon SC |
| 1594561 | Thomas | Gareth | Gareth | Open/Male | Colchester SC | |
| 62518 | Thomas | Garfield | Garfield | 1940 | Open/Male | Bridgend Swim Club |
| 75656 | Thomas | Garod | Garod | 1980 | Open/Male | Bridgend County Swim Squad |
| 5269 | Thomas | Gary | Gary | 1961 | Open/Male | Kingston Upon Hull SC |
| 1121380 | Thomas | Gary | Gary | 1971 | Open/Male | Corby ASC |
| 9999901497 | Thomas | Gavin | Gavin | Open/Male | ||
| 76746 | Thomas | Gemma | Gemma | Female | ||
| 915897 | Thomas | Genevieve | Genevieve | 2002 | Female | City of Cardiff |
| 953142 | Thomas | Genevieve | Genevieve | 2006 | Female | Leyland Barracudas Swimming Club |
| 97002429 | Thomas | Geoff | Geoff | 2010 | Open/Male | Flint Swimming Club |
| 310607 | Thomas | George | George | Open/Male | Devizes ASC | |
| 559528 | Thomas | George | George | 1994 | Open/Male | Watford SC |
| 873117 | Thomas | George | George | Open/Male | Leighton Buzzard SC | |
| 1262451 | Thomas | George | George | 2006 | Open/Male | Eastbourne SC |
| 1351950 | Thomas | George | George | 2005 | Open/Male | Penyrheol ASC |
| 47796 | Thomas | Georgia | Georgia | Female | Warley Wasps SC | |
| 466566 | Thomas | Georgia | Georgia | Female | City of Hereford SC | |
| 546907 | Thomas | Georgia | Georgia | 1998 | Female | Torfaen Dolphins Performance |
| 857072 | Thomas | Georgia | Georgia | 2003 | Female | Deepings SC |
| 1101537 | Thomas | Georgia | Georgia | 2001 | Female | Biddulph SC |
| 1197960 | Thomas | Georgia | Georgia | 2005 | Female | Epsom District SC |
| 443276 | Thomas | Georgia E | Georgia E | 1996 | Female | Bridgend County Swim Squad |
| 97005902 | Thomas | Georgie | Georgie | 2016 | Female | Aberdare Comets Diving Club |
| 59128 | Thomas | Georgina | Georgina | 1992 | Female | |
| 1608904 | Thomas | Georgina | Georgina | 2012 | Female | Felixstowe SC |
| 1675664 | Thomas | Georgina | Georgina | 2010 | Female | City of Sheffield Diving Club |
| 1702526 | Thomas | Gethin | Geth | Open/Male | Kendal SC | |
| 77270 | Thomas | Glyn | Glyn | Open/Male | ||
| 90565 | Thomas | Grace | Grace | Female | ||
| 817947 | Thomas | Grace | Grace | 2000 | Female | Fishguard Flyers |
| 841265 | Thomas | Grace | Grace | 2001 | Female | Penyrheol ASC |
| 952755 | Thomas | Grace | Grace | 2001 | Female | Nofio Clwyd |
| 959833 | Thomas | Grace | Grace | Female | Ashton Central SC | |
| 1122766 | Thomas | Grace | Grace | Female | Orpington Ojays | |
| 1243347 | Thomas | Grace | Grace | 2005 | Female | City Of Newport Swimming & Water |
| 1253496 | Thomas | Grace | Grace | 2007 | Female | Milford Haven |
| 1364223 | Thomas | Grace | Thomas | 2008 | Female | Oswestry Otters SC |
| 1460862 | Thomas | Grace | Grace | 2009 | Female | Flitwick Dolphins SC |
| 1449066 | Thomas | Grace | Grace | 2010 | Female | Llanelli |
| 1486145 | Thomas | Grace | Grace | 2007 | Female | City of Southampton SC |
| 1493104 | Thomas | Grace | Grace | Open/Male | Thurrock Swimming Club | |
| 1619685 | Thomas | Grace | Grace | 2011 | Female | Carmarthen |
| 1700027 | Thomas | Grace | Grace | Female | Dinnaton SC | |
| 742869 | Thomas | Graeme | Graeme | Open/Male | Kettering Amateur Swimming Club | |
| 81227 | Thomas | Greg | Greg | 1993 | Open/Male | Wey Valley SC |
| 1202416 | Thomas | Gregory | Gregory | 2009 | Open/Male | Dinnaton SC |
| 1750414 | Thomas | Gregory | Gregory | 1993 | Open/Male | Solent Cardinal Performance Swim |
| 945453 | Thomas | Griffin | Griff | 2008 | Open/Male | Winchester City Penguins |
| 1365718 | Thomas | Gruffudd | Gruffudd | 2007 | Open/Male | Forward Hillingdon Squad |
| 97002568 | Thomas | Gruffudd | Gruffudd | 1997 | Open/Male | Cardiff Masters |
| 1295337 | Thomas | Gruffydd | Gruffydd | 2004 | Open/Male | Abertillery Piranhas SC |
| 1614542 | Thomas | Gruffydd | Gruff | 2010 | Open/Male | City of Cardiff |
| 1522286 | Thomas | Gus | Guy | Open/Male | Verulam ASC | |
| 1577295 | Thomas | Guto | Guto | 2009 | Open/Male | Clwb Nofio Ynys Môn | Isle of An |
| 9999911803 | Thomas | Guy | Guy | Open/Male | ||
| 97003304 | Thomas | Gwen | Gwen | 2014 | Female | Pontypridd Swimming Club |
| 1507699 | Thomas | Gwenan | Gwenan | Female | ASKA (Chester) Swimming Club | |
| 550106 | Thomas | Gwennan | Gwennan | Female | Carn Brea and Helston SC | |
| 1488183 | Thomas | Gwydion | Gwydion | 2010 | Open/Male | Abertillery Piranhas SC |
| 825015 | Thomas | Gwyn | Gwyn | 2004 | Open/Male | Rhondda Cynon Taf Performance Sw |
| 92646 | Thomas | Gwyneth | Gwyneth | 1984 | Female | Cardiff Masters |
| 21950 | Thomas | Haley | Haley | Female | ||
| 206533 | Thomas | Hannah | Hannah | 1996 | Female | Enfield Swim Squad |
| 9999913086 | Thomas | Hannah | Hannah | Female | ||
| 9999927538 | Thomas | Hannah | Hannah | Female | ||
| 478194 | Thomas | Hannah | Hannah | 1998 | Female | Merthyr Tydfil Swimming Club |
| 753139 | Thomas | Hannah | Hannah | 1998 | Female | Connahs Quay Swimming Club |
| 777191 | Thomas | Hannah | Hannah | Female | Everton Swimming Assoc | |
| 882522 | Thomas | Hannah | Hannah | 2000 | Female | Wycombe District SC |
| 885729 | Thomas | Hannah | Hannah | 2000 | Female | Holywell Swimming Club |
| 1231352 | Thomas | Hannah | Hannah | 2004 | Female | Caerphilly County Swim Squad |
| 1311846 | Thomas | Hannah | Hannah | 2009 | Female | Chatteris Kingfishers SC |
| 1399750 | Thomas | Hannah | Hannah | 2009 | Female | Merthyr Tydfil Swimming Club |
| 1408362 | Thomas | Hannah | Hannah | Female | Highworth ASC | |
| 1693580 | Thomas | Hannah | Hannah | Female | City of St Albans SC | |
| 1720556 | Thomas | Hannah | Hannah | Female | Beckenham SC | |
| 1340374 | Thomas | Harley | Harley | 2007 | Open/Male | Aberaeron SC |
| 1739401 | Thomas | Harley | Harley | 2011 | Open/Male | Bourne End SC |
| 1335641 | Thomas | Harriet | Harriet Reece | 2011 | Female | Aberavon Swimming Club |
| 1594505 | Thomas | Harriet | Harriet | 2011 | Female | Ware SC |
| 1635787 | Thomas | Harriet | Harriet | Female | Louth Dolphins SC | |
| 1680629 | Thomas | Harriet | Harriet | 2013 | Female | Felixstowe SC |
| 1719525 | Thomas | Harriet | Harri | 2012 | Female | Farnham SC |
| 1529794 | Thomas | Harrison | Harrison | Open/Male | Onward Dolphin SC | |
| 1460427 | Thomas | Harrison | Harrison | Open/Male | Wellington (Telford) SC | |
| 1152163 | Thomas | Harrison | Harrison | Open/Male | Frome SC | |
| 1682662 | Thomas | Harrison | Harrison | Open/Male | Market Harborough SC | |
| 726473 | Thomas | Harry | Harry | 2003 | Open/Male | Tenby |
| 1139412 | Thomas | Harry | Harry | 2008 | Open/Male | Bradford-On-Avon ASC |
| 1278723 | Thomas | Harry | Harry | Open/Male | Dorking Swimming Club | |
| 1313718 | Thomas | Harry | Harry | 2006 | Open/Male | |
| 1416653 | Thomas | Harry | Harry | Open/Male | Exeter City Swimming Club | |
| 1485695 | Thomas | Harry | Harry | Open/Male | Fleetwood & District SC | |
| 1614145 | Thomas | Harry | Harry | 2010 | Open/Male | Derby Phoenix SC |
| 1625689 | Thomas | Harry | Harry | Open/Male | Minehead & West Somerset SC | |
| 97000037 | Thomas | Harry | Harry | 2010 | Open/Male | Haverfordwest |
| 97005020 | Thomas | Harry | Harry | 2012 | Open/Male | City of Swansea Aquatics Club |
| 883919 | Thomas | Harvey | Harvey | Open/Male | Hunstanton Sea Eagles | |
| 1515838 | Thomas | Harvey | Harvey | 2011 | Open/Male | Eaton Square SC |
| 1513472 | Thomas | Hattie | Hattie | 2009 | Female | St Austell ASC |
| 1584830 | Thomas | Haven | Haven | 2009 | Female | Boldmere Swimming and Water Polo |
| 1411461 | Thomas | Hawen | Hawen | 2008 | Female | Amman Valley |
| 395539 | Thomas | Hayden | Hayden | 1995 | Open/Male | Epping Forest Dist SC |
| 1260918 | Thomas | Hayden | Hayden | Open/Male | Newton Abbot Swimming and Water | |
| 1360095 | Thomas | Hayden | Hayden | 2000 | Open/Male | Flitwick Dolphins SC |
| 1636750 | Thomas | Hayden | Hayden | Open/Male | Redditch SC | |
| 1247059 | Thomas | Haydn | Haydn | 2003 | Open/Male | City Of Newport Swimming & Water |
| 1190255 | Thomas | Haydyn | Haydyn | 2004 | Open/Male | Blaenafon Barracudas SC |
| 9999923240 | Thomas | Hayley | Hayley | Female | ||
| 9999926633 | Thomas | Hayley | Hayley | Female | ||
| 555585 | Thomas | Hayley | Louisa | 1998 | Female | Rhondda Cynon Taf Performance Sw |
| 1505316 | Thomas | Hazel | Hazel | 2007 | Female | Bottisham SC |
| 775385 | Thomas | Heather | Heather | Female | Watford SC | |
| 1634628 | Thomas | Heather | Alex | Female | Birmingham Marlins Swimming Club | |
| 1584096 | Thomas | Heidi | Heidi | 2009 | Female | Thetford Dolphins SC |
| 23263 | Thomas | Helen | Helen | Female | Wirral Metro SC | |
| 1631102 | Thomas | Helen | Helen | Female | Carrick Masters | |
| 1233652 | Thomas | Henrietta | Hetty | Female | Exmouth Swimming & Lifesaving So | |
| 895339 | Thomas | Henry | Henry | Open/Male | Enfield Swim Squad | |
| 1287710 | Thomas | Henry | Henry | Open/Male | Loddon White Dolphin SC | |
| 1452158 | Thomas | Henry | Henry | Open/Male | Chester-Le-Street SC | |
| 1511148 | Thomas | Henry | Henry | Open/Male | Leamington Spa SC | |
| 1520897 | Thomas | Henry | Henry | Open/Male | Adwick (Doncaster) SC | |
| 1581888 | Thomas | Henry | Henry | 2008 | Open/Male | Royston SC |
| 1634920 | Thomas | Henry | Henry | Open/Male | Sandwell Aquatics Club | |
| 1676369 | Thomas | Henry | Henry | Open/Male | Swindon Dolphin ASC | |
| 1716019 | Thomas | Henry | Henry | 2013 | Open/Male | Caradon SC |
| 1724689 | Thomas | Henry | Henry | Open/Male | Trafford Metro Bor SC | |
| 1750442 | Thomas | Henry | Henry | Open/Male | Marlborough Penguins ASC | |
| 181540 | Thomas | Hollie | Hollie | 1997 | Female | Haverfordwest |
| 9999801157 | Thomas | Hollie | Hollie | Female | ||
| 1262512 | Thomas | Hollie | Hollie | Female | Fareham Nomads SC | |
| 1353918 | Thomas | Hollie | Hollie | 2008 | Female | Weymouth SC |
| 79005 | Thomas | Holly | Holly | 1994 | Female | Sevenoaks SC |
| 266087 | Thomas | Holly | Holly | Female | Ledbury & Malvern SC | |
| 517756 | Thomas | Holly | Holly | 1998 | Female | Amman Valley |
| 947293 | Thomas | Holly | Holly | Female | City of Bristol SC | |
| 1235629 | Thomas | Holly | Holly | 2005 | Female | Sheffield City SC |
| 980450 | Thomas | Holly | Holly | 2007 | Female | Bridgend County Swim Squad |
| 1477850 | Thomas | Holly | Holly | 2008 | Female | Carmarthen |
| 1730787 | Thomas | Hope | Hope | Female | City of Cambridge SC | |
| 1373143 | Thomas | Howell | Howell | Open/Male | Ashton Central SC | |
| 1529792 | Thomas | Hugo | Hugo | Open/Male | Onward Dolphin SC | |
| 501475 | Thomas | Hugo | Hugo | 1998 | Open/Male | Teddington SC |
| 1166710 | Thomas | Hugo | Hugo | 2005 | Open/Male | Dive London Aquatics Club |
| 30855 | Thomas | Huw | Huw | Open/Male | ||
| 95745 | Thomas | Huw | Huw | 1974 | Open/Male | |
| 9999923454 | Thomas | Huw | Huw | Open/Male | ||
| 1668332 | Thomas | Huw | Huw | Open/Male | Northgate Bridgnorth SC | |
| 1483037 | Thomas | Huxley | Huxley | Open/Male | Haslemere Swimming Club | |
| 907930 | Thomas | Iestyn | Iestyn | 2004 | Open/Male | Celtic Dolphins |
| 1251188 | Thomas | Iestyn | Iestyn | 2007 | Open/Male | Neath ASC |
| 1180865 | Thomas | Ieuan | Ieuan | 2003 | Open/Male | Neath ASC |
| 97004218 | Thomas | Ifan | Ifan | 2012 | Open/Male | Nofio Clwyd |
| 905520 | Thomas | Imogen | Imogen | 2007 | Female | Sandwell Aquatics Club |
| 97002132 | Thomas | Imogen | Imogen | 2010 | Female | Barry ASC |
| 1750477 | Thomas | Imogen | Imi | Female | Gainsborough Dolphins SC | |
| 1234021 | Thomas | Ina | Ina | Female | Blaydon & District SC | |
| 90045503 | Thomas | Indi | Indi | Female | Elgin SC | |
| 170270 | Thomas | India | India | 1994 | Female | Clevedon SC |
| 97004347 | Thomas | Ioan | Ioan | 2012 | Open/Male | City of Cardiff |
| 97007260 | Thomas | Ioan | Ioan | 2013 | Open/Male | Aberavon Swimming Club |
| 972584 | Thomas | Iolo | Iolo | 2002 | Open/Male | Llanelli |
| 1409795 | Thomas | Iolo | Iolo | 2010 | Open/Male | Neath ASC |
| 397796 | Thomas | Iona | Iona | 1997 | Female | Clevedon SC |
| 1625222 | Thomas | Iris | Iris | Female | Ryde Swimming Club | |
| 1353588 | Thomas | Isabel | Izzie | 2008 | Female | Newmarket & Dist SC |
| 1364723 | Thomas | Isabella | Isabella | 2005 | Female | Bridgend County Swim Squad |
| 1517600 | Thomas | Isabella | Isabella | 2010 | Female | City of Cardiff |
| 1521612 | Thomas | Isabella | Isabella | 2010 | Female | Chippenham ASC |
| 1596617 | Thomas | Isabella | Bella | 2009 | Female | Gloucester City SC |
| 1191205 | Thomas | Isabelle | Izzy | 2004 | Female | Bridgend County Swim Squad |
| 1288464 | Thomas | Isabelle | Isabelle | Female | City of Leeds Diving Club | |
| 1416388 | Thomas | Isabelle | Isabelle | 2007 | Female | Torfaen Dolphins Performance |
| 90007344 | Thomas | Isabelle | Isabelle | 2006 | Female | Garioch ASC |
| 1398276 | Thomas | Isabelle | Isabelle | Female | Cannock Phoenix Swimming Club | |
| 1481895 | Thomas | Isabelle | Jaime | Female | Kimberley SC | |
| 97003657 | Thomas | Isabelle | Isabelle | 2014 | Female | Wrexham Swimming Club |
| 1418446 | Thomas | Isla | Isla | Female | Tunbridge Wells Diving Club | |
| 1614366 | Thomas | Isla | Isla | Female | Ealing SC | |
| 1725958 | Thomas | Isla | Isla | 2013 | Female | Cranleigh SC |
| 1728406 | Thomas | Isla | Isla | Female | Windsor SC | |
| 1764088 | Thomas | Isla | Isla | Female | Verulam ASC | |
| 141913 | Thomas | Isobel | Isobel | Female | Ludlow Swimming Club | |
| 933214 | Thomas | Isobel | Isobel | 2003 | Female | Dawlish SC |
| 966502 | Thomas | Isobel | Isobel | Female | Walsall Swim and Water Polo Club | |
| 1106676 | Thomas | Isobel | Isobel | 2006 | Female | Windsor SC |
| 1504688 | Thomas | Isobel | Isobel | Female | Stretford SC | |
| 1742198 | Thomas | Ivy | Ivy | 2014 | Female | Kingston Upon Hull SC |
| 1444879 | Thomas | Iwan | Iwan | 2007 | Open/Male | Bridgend County Swim Squad |
| 1626579 | Thomas | Iwan | Iwan | 2011 | Open/Male | Mold |
| 1737971 | Thomas | Izzy | Izzy | Female | Cambridge University Swimming & | |
| 543188 | Thomas | Jac | Jac | 2000 | Open/Male | Llanelli |
| 1295010 | Thomas | Jac | Jac | 2006 | Open/Male | Newtown Swimming Club |
| 45847 | Thomas | Jack | Jack | 1991 | Open/Male | Cardiff Masters |
| 74041 | Thomas | Jack | Jack | 1995 | Open/Male | Llandudno Swimming |
| 1238950 | Thomas | Jack | Jack | Open/Male | Soundwell SC | |
| 1328958 | Thomas | Jack | Jack | 2006 | Open/Male | Killerwhales SC (Havering) |
| 1427796 | Thomas | Jack | Jack | 2011 | Open/Male | Chester-Le-Street SC |
| 1447141 | Thomas | Jack | Jack | 2003 | Open/Male | Bridgend Swim Club |
| 1469015 | Thomas | Jack | Jack | Open/Male | Fox Hollies | |
| 1765727 | Thomas | Jack | Jack | 2014 | Open/Male | Borocuda Teesside ASC |
| 1500863 | Thomas | Jack Oliver | Jack | Open/Male | Burton Amateur SC | |
| 311646 | Thomas | Jacob | Jacob | 1995 | Open/Male | Bridgend County Swim Squad |
| 553851 | Thomas | Jacob | Jacob | 1999 | Open/Male | Clwb Nofio Bangor Swim Club |
| 1148304 | Thomas | Jacob | Jacob | 2005 | Open/Male | Elmbridge Phoenix SC |
| 1174938 | Thomas | Jacob | Jacob | 2002 | Open/Male | Deben SC |
| 1195601 | Thomas | Jacob | Jacob | Open/Male | Retford SC | |
| 1264155 | Thomas | Jacob | Jacob | Open/Male | Stockton ASC | |
| 787772 | Thomas | Jacob Royan | Jac | 1999 | Open/Male | Tenby |
| 48050 | Thomas | Jade | Jade | 1996 | Female | Tenby |
| 1165254 | Thomas | Jade | Jade | 2005 | Female | St Ives Bay SC |
| 1237552 | Thomas | Jaelyn | Jaelyn | Female | Enfield Swim Squad | |
| 975275 | Thomas | Jaiden | Jaiden | 2007 | Open/Male | Enfield Swim Squad |
| 214152 | Thomas | Jake | Jake | Open/Male | Merton Pisces | |
| 415993 | Thomas | Jake | Jake | 1996 | Open/Male | Yeovil District SC |
| 1263987 | Thomas | Jake | Jake | Open/Male | Minehead & West Somerset SC | |
| 1625997 | Thomas | Jake | Jake | Open/Male | Wimbledon Dolphins SC | |
| 1643164 | Thomas | Jake | Jake | 2013 | Open/Male | Fleetwood & District SC |
| 97005021 | Thomas | Jake | Jake | 2014 | Open/Male | City of Swansea Aquatics Club |
| 764 | Thomas | James | James | 1978 | Open/Male | Bramcote Swimming Club |
| 753140 | Thomas | James | James | 1995 | Open/Male | Connahs Quay Swimming Club |
| 873112 | Thomas | James | James | Open/Male | Leighton Buzzard SC | |
| 1182082 | Thomas | James | James | 2006 | Open/Male | Llanelli |
| 1192106 | Thomas | James | James | Open/Male | Haslemere Swimming Club | |
| 1418765 | Thomas | James | James | 2008 | Open/Male | Deepings SC |
| 1364184 | Thomas | James | James | 2010 | Open/Male | Gainsborough Dolphins SC |
| 1378291 | Thomas | James | James | Open/Male | North East Disability Swim Club | |
| 1399253 | Thomas | James | James | 2009 | Open/Male | Soundwell SC |
| 1595069 | Thomas | James | James | Open/Male | Albatross DC | |
| 1728368 | Thomas | James | James | 2011 | Open/Male | Torridgeside SC |
| 8011 | Thomas | Jamie | Jamie | Open/Male | Edmonton Phoenix Swimming Club | |
| 325261 | Thomas | Jamie | Jamie | 1997 | Open/Male | Chester Academy Aquatics Club |
| 940186 | Thomas | Jamie | Jamie | 1999 | Open/Male | Dane Valley SC |
| 1197529 | Thomas | Jamie | Jamie | 2002 | Open/Male | Penyrheol ASC |
| 1381288 | Thomas | Jamie | Jamie | Open/Male | Winchester City Penguins | |
| 1405777 | Thomas | Jamie | Jamie | Open/Male | Melksham ASC | |
| 531587 | Thomas | Jan | Jan | 1941 | Female | Saxon Crown (Lewisham) SC |
| 4102 | Thomas | Jane | Jane | 1959 | Female | G29 Wild Swimmers DLL Eastbourne |
| 367011 | Thomas | Janine | Janine | Female | Heron Swim Team Somerset | |
| 143676 | Thomas | Jasmin | Jasmin | 1979 | Female | Cardiff Masters |
| 1406194 | Thomas | Jasmine | Jasmine | 2006 | Female | Abertillery Piranhas SC |
| 90020425 | Thomas | Jasmine | Jasmine | 2008 | Female | Inverclyde ASC |
| 1618197 | Thomas | Jasmine | Jasmine | Female | Bere Regis & District SC | |
| 1256169 | Thomas | Jay | Jay | Open/Male | Warrington Swimming Club | |
| 7714 | Thomas | Jean | Jean | Female | Wellingborough SC | |
| 51196 | Thomas | Jeff | Jeff | 1966 | Open/Male | Bridgend Swim Club |
| 1257760 | Thomas | Jema | Jema | Female | Accrington SC | |
| 1318645 | Thomas | Jemima | Jemima | 2005 | Female | Worthing Swimming Club |
| 1183118 | Thomas | Jemma | Jemma | 2004 | Female | Cheltenham S & W P Club |
| 48117 | Thomas | Jennifer | Jennifer | 1994 | Female | Clwb Nofio Bangor Swim Club |
| 64534 | Thomas | Jennifer | Jennifer | Female | Camden Swiss Cottage SC | |
| 758624 | Thomas | Jennifer | Jennifer | 2000 | Female | Penyrheol ASC |
| 43171 | Thomas | Jenny | Jenny | Female | ||
| 1431180 | Thomas | Jenson | Jenson | Open/Male | Newton Abbot Swimming and Water | |
| 1687945 | Thomas | Jenson | Jenson | Open/Male | Braunstone SC | |
| 1741851 | Thomas | Jeremia | Jerry | Open/Male | City of Bristol SC | |
| 942280 | Thomas | Jesse | Jesse | 2005 | Open/Male | Windsor SC |
| 39079 | Thomas | Jessica | Jessica | 1991 | Female | Southwold Swimming Club |
| 62666 | Thomas | Jessica | Jessica | 1995 | Female | Carmarthen |
| 9999800744 | Thomas | Jessica | Jessica | Female | ||
| 451997 | Thomas | Jessica | Jessica | 2000 | Female | Chester Academy Aquatics Club |
| 501217 | Thomas | Jessica | Jessica | Female | Amman Valley | |
| 965399 | Thomas | Jessica | Jessica | 2008 | Female | Borough Of Stockton Swim Scheme |
| 1397295 | Thomas | Jessica | Jessica | Female | Thetford Dolphins SC | |
| 1412259 | Thomas | Jessica | Jessica | 2008 | Female | Colchester SC |
| 1427082 | Thomas | Jessica | Jessica | Female | Bristol Henleaze SC | |
| 90023859 | Thomas | Jessica | Jessica | Female | Nairn ASC | |
| 1523061 | Thomas | Jessica | Jessica | Female | Broxbourne SC | |
| 1598106 | Thomas | Jessica | Jessica | 2011 | Female | Godalming ASC |
| 1730665 | Thomas | Jessica | Jessica | Female | Andover Swimming & WP Club | |
| 787777 | Thomas | Jevon Neil | Jev | 2000 | Open/Male | Tenby |
| 1169649 | Thomas | Jj | Jj | 2003 | Open/Male | Halifax SC |
| 90029811 | Thomas | Jo | Jo | 2005 | Open/Male | |
| 1577768 | Thomas | Jodi | Jodi | 2000 | Female | Harwich Dovercourt/Parkeston SC |
| 24523 | Thomas | Jodie | Jodie | Female | ||
| 268521 | Thomas | Joe | Joe | Open/Male | Hastings Seagull SC | |
| 445412 | Thomas | Joe | Joe | 2000 | Open/Male | Neath ASC |
| 1198794 | Thomas | Joe | Joe | 2005 | Open/Male | Nexus Valleys Swimming Club |
| 5853 | Thomas | Joel | Joel | 1987 | Open/Male | Cheltenham S & W P Club |
| 1402558 | Thomas | Joel | Joel | Open/Male | Romsey & Totton SC | |
| 1459114 | Thomas | Joel | Joel | 2008 | Open/Male | Bridgend County Swim Squad |
| 9999800743 | Thomas | Jonathan | Jonathan | Open/Male | ||
| 249056 | Thomas | Jonathan | Jonathan | 1960 | Open/Male | Guildford City Swimming Club |
| 323356 | Thomas | Jordan | Jordan | 1996 | Open/Male | |
| 1484651 | Thomas | Jordan | Jordan | 2005 | Female | Saffron Walden SC |
| 284739 | Thomas | Josef | Josef | 1999 | Open/Male | Penyrheol ASC |
| 1508058 | Thomas | Joseff | Joseff | 2009 | Open/Male | Clwb Nofio P.B.P. |
| 55114 | Thomas | Joseph | Joseph | Open/Male | ||
| 1299852 | Thomas | Joseph | Joseph | 2007 | Open/Male | Brentwood SC |
| 1300930 | Thomas | Joseph | Joseph | Open/Male | Skipton Swimming Club | |
| 1340338 | Thomas | Joseph | Joseph | Open/Male | Sevenoaks SC | |
| 1187156 | Thomas | Joseph | Joe | Open/Male | Academy Swim Team Burnham | |
| 1607832 | Thomas | Joseph | Joe | 2012 | Open/Male | Bristol North SC |
| 90038633 | Thomas | Joseph | Joseph | Open/Male | Heart Of Midlothian ASC | |
| 1740943 | Thomas | Joseph | Joseph | 2010 | Open/Male | Hemel Hempstead SC |
| 1436380 | Thomas | Josephine | Josephine | Female | Leander SC | |
| 97004100 | Thomas | Josephine | Josephine | 2012 | Female | Abergavenny Swimming Club |
| 76719 | Thomas | Joshua | Joshua | 1994 | Open/Male | Bridgend County Swim Squad |
| 81767 | Thomas | Joshua | Joshua | Open/Male | Tenby | |
| 230342 | Thomas | Joshua | Joshua | 1994 | Open/Male | Chichester (Cormorant) SC |
| 720240 | Thomas | Joshua | Joshua | 2002 | Open/Male | Staines Swimming Club |
| 731331 | Thomas | Joshua | Joshua | 1996 | Open/Male | Brockworth Swimming Club |
| 756763 | Thomas | Joshua | Joshua | 2001 | Open/Male | Merthyr Tydfil Swimming Club |
| 804063 | Thomas | Joshua | Joshua | 2001 | Open/Male | Carn Brea and Helston SC |
| 928029 | Thomas | Joshua | Joshua | 2000 | Open/Male | Carmarthen |
| 1114055 | Thomas | Joshua | Josh | 2003 | Open/Male | Swansea Water Polo |
| 1636437 | Thomas | Joshua | Joshua | Open/Male | Rushcliffe SC | |
| 1675921 | Thomas | Joshua | Joshua | Open/Male | Halton SC | |
| 550773 | Thomas | Josie | Josie | 1998 | Female | Clevedon SC |
| 1168914 | Thomas | Josie | Josie | 2005 | Female | Ledbury & Malvern SC |
| 1409739 | Thomas | Josie | Josie | 2009 | Female | Bridgend County Swim Squad |
| 1459734 | Thomas | Jude | Jude | Open/Male | Buxton & District SC | |
| 471327 | Thomas | Judy | Judy | 1941 | Female | Penzance SA and WPC |
| 2035 | Thomas | Julie | Julie | Female | Wellingborough SC | |
| 1669898 | Thomas | Juno | Juno | 2010 | Female | Stretford SC |
| 1379265 | Thomas | Kai | Kai | 2007 | Open/Male | City Of Newport Swimming & Water |
| 1760698 | Thomas | Kai | Kai | Open/Male | Brent Dolphins SC | |
| 1763531 | Thomas | Kaia | Kaia | 2014 | Female | Newquay Cormorants SC |
| 97003279 | Thomas | Kaitlyn | Kaitlyn | 2013 | Female | Pontypridd Swimming Club |
| 819256 | Thomas | Kane | Kane | 2000 | Open/Male | Seabyrd SC |
| 1250037 | Thomas | Karan | Karan | Open/Male | Leicester Sharks Swimming Club | |
| 1760702 | Thomas | Kaream | Kaream | Open/Male | Brent Dolphins SC | |
| 9999908629 | Thomas | Karen | Karen | Female | ||
| 63250 | Thomas | Karl | Karl | Open/Male | Putteridge Swimming Club | |
| 1470891 | Thomas | Kate | Kate | Female | Rochdale Swimming Club | |
| 1159225 | Thomas | Katerina | Kitty | 2003 | Female | Douglas SC |
| 720360 | Thomas | Kathryn | Kathryn | 1971 | Female | Trafford Metro Bor SC |
| 801274 | Thomas | Kathryn | Kathryn | 2000 | Female | Warrington Warriors SC |
| 1365466 | Thomas | Kathryn | Kathryn | 2003 | Female | Bracknell & Wokingham SC |
| 76109 | Thomas | Katie | Katie | 1990 | Female | Penyrheol ASC |
| 536775 | Thomas | Katie | Katie | 1998 | Female | Trafford Metro Bor SC |
| 1216835 | Thomas | Katie | Katie | 2003 | Female | Erith & District SC |
| 1325908 | Thomas | Katie | Katie | Female | Sevenoaks SC | |
| 1757193 | Thomas | Katie | Katie | Female | Trafford Metro Bor SC | |
| 9999904698 | Thomas | Katy | Katy | Female | ||
| 1643601 | Thomas | Kaval | Kaval | Open/Male | Plymouth Rn/Rm | |
| 1514920 | Thomas | Kaya | Kaya | Open/Male | Fleetwood & District SC | |
| 1731088 | Thomas | Kayleigh | Kayleigh | Female | Devonport RSA | |
| 1286452 | Thomas | Kaylem | Kaylem | 2006 | Open/Male | Bor of Waltham Forest (Gators) |
| 1596244 | Thomas | Kaylin | Rhys | 2011 | Female | Sittingbourne & Milton SC |
| 1760703 | Thomas | Kaylum | Kaylum | Open/Male | Brent Dolphins SC | |
| 1442554 | Thomas | Keeley | Keeley | 2012 | Female | Woking SC |
| 32601 | Thomas | Keiran | Keiran | Open/Male | ||
| 449233 | Thomas | Kelly | Kelly | Female | Basingstoke Bluefins SC | |
| 1648099 | Thomas | Kelly | Kelly | 1985 | Female | Wildern Waves |
| 1629666 | Thomas | Kelsey | Kelsey | 2014 | Female | Heads of the Valleys |
| 1634584 | Thomas | Kelsey | Kelsey | 2013 | Female | Solihull SC |
| 1278439 | Thomas | Kelsie | Kelsie | Female | Devonport RSA | |
| 362497 | Thomas | Kendall | Kendall | Female | Guildford City Swimming Club | |
| 1349015 | Thomas | Kerri | Kerri | Female | Faversham SC | |
| 870756 | Thomas | Kes | Kes | 2001 | Open/Male | Clwb Nofio Ynys Môn | Isle of An |
| 1736693 | Thomas | Kevin | Kevin | 1986 | Open/Male | Hillingdon Swimming Club |
| 1673057 | Thomas | Keziah | Keziah | Female | Winchester City Penguins | |
| 783902 | Thomas | Kieran | Kieran | 1998 | Open/Male | Denbighshire Development Team |
| 1400780 | Thomas | Kieran | Kieran | 2005 | Open/Male | Preseli Panthers |
| 784687 | Thomas | Kieron | Kieron | 1999 | Open/Male | Northampton Swimming Club |
| 31707 | Thomas | Kim | Kim | Female | ||
| 1510603 | Thomas | Kiran | Kiran | Open/Male | Hoddesdon SC | |
| 1484156 | Thomas | Kirie | Kirie | 2009 | Female | Neath ASC |
| 9999930584 | Thomas | Kirsty | Kirsty | Female | ||
| 1633499 | Thomas | Kitty | Kitty | 2011 | Female | Deben SC |
| 1491651 | Thomas | Koby | Thomas | Open/Male | Kingsbury Aquarius SC | |
| 259136 | Thomas | Kristian | Kristian | 1997 | Open/Male | Wrexham Swimming Club |
| 1766354 | Thomas | Kyra | Kyra | Female | Haringey Aquatics | |
| 1470607 | Thomas | Lacey | Lacey | 2009 | Female | Fishguard Flyers |
| 1444247 | Thomas | Laila | Laila | Female | Weston-Super-Mare SC | |
| 1416133 | Thomas | Lanais | Lanais | Female | Crystal Palace Diving Club | |
| 319499 | Thomas | Lance | Lance | 1996 | Open/Male | Sheffield City SC |
| 1327457 | Thomas | Larissa | Larissa | Female | Leighton Buzzard SC | |
| 31543 | Thomas | Laura | Laura | 1985 | Female | Llandarcy ASC |
| 38101 | Thomas | Laura | Laura | Female | Swindon Dolphin ASC | |
| 9999914777 | Thomas | Laura | Laura | Female | ||
| 466710 | Thomas | Laura | Laura | 1997 | Female | Lydney SC |
| 138967 | Thomas | Lauren | Lauren | 1993 | Female | Bridgend County Swim Squad |
| 169389 | Thomas | Lauren | Lauren | 1995 | Female | Newton Abbot Swimming and Water |
| 522561 | Thomas | Lauren | Lauren | 2000 | Female | Connahs Quay Swimming Club |
| 851397 | Thomas | Lauren | Laure | 2001 | Female | Flint Swimming Club |
| 939171 | Thomas | Lauren | Lauren | 2002 | Female | Biggleswade SC |
| 1309182 | Thomas | Lauren | Lauren | 2008 | Female | Neath ASC |
| 1329186 | Thomas | Lauren | Lauren | 2005 | Female | Rushmoor Royals SC |
| 1371592 | Thomas | Lauren | Lauren | Female | Ellesmere Port SC | |
| 281040 | Thomas | Lauren Louise | Lauren Louise | Female | Bor of Waltham Forest (Gators) | |
| 1275279 | Thomas | Layla | Layla | 2006 | Female | Rhondda |
| 1258851 | Thomas | Layton | Layton | 2004 | Open/Male | Corby ASC |
| 1215669 | Thomas | Lea | Lea | 2005 | Female | Corwen Sharks |
| 894131 | Thomas | Leah | Leah | 2001 | Female | Camden Swiss Cottage SC |
| 898636 | Thomas | Leah | Leah | 1999 | Female | Stanway SC |
| 1328296 | Thomas | Leah | Leah | Female | Bristol Penguin Olympic SC | |
| 1596385 | Thomas | Leah | Leah | 2011 | Female | Haverfordwest |
| 90152 | Thomas | Lee | Lee | 1988 | Open/Male | Worcester SC |
| 401031 | Thomas | Lee | Lee | 1963 | Open/Male | Kenilworth Masters SC |
| 265321 | Thomas | Leif-Roy | Leif | 1996 | Open/Male | Stevenage SC |
| 957835 | Thomas | Leighton | Leighton | 2004 | Open/Male | Cheadle (Staffs) & District |
| 1730280 | Thomas | Leila | Leila | Female | Brent Dolphins SC | |
| 1195339 | Thomas | Leilana | Leilana | 2004 | Female | South Axholme Sharks SC |
| 1407041 | Thomas | Lennox | Lennox | Open/Male | Enfield Swim Squad | |
| 1183871 | Thomas | Leo | Leo | 2005 | Open/Male | Godalming ASC |
| 1642201 | Thomas | Leo | Leo | Open/Male | Bridgwater Amateur Swimming Club | |
| 525272 | Thomas | Leon | Leon | 1997 | Open/Male | City of Swansea Aquatics Club |
| 1601197 | Thomas | Leoni | Leoni | Female | ORCA (Royton) | |
| 1328923 | Thomas | Levi | Levi | 2008 | Open/Male | Rhondda |
| 324546 | Thomas | Lewis | Lewis | Open/Male | City of Cardiff | |
| 9999801159 | Thomas | Lewis | Lewis | Open/Male | ||
| 755792 | Thomas | Lewis | Lewis | 2000 | Open/Male | Rhondda Cynon Taf Performance Sw |
| 1133334 | Thomas | Lewis | Lewis | 2005 | Open/Male | Edinburgh Diving Club |
| 500745 | Thomas | Lewys | Lewys | Open/Male | Seagulls Swimming Club | |
| 1657582 | Thomas | Lexie | Lexie | Female | Fleetwood & District SC | |
| 9999907049 | Thomas | Liam | Liam | Open/Male | ||
| 1272490 | Thomas | Libby | Libby | Female | Eastbourne SC | |
| 1359165 | Thomas | Libby | Libby | 2004 | Female | Chepstow & District SC |
| 1524191 | Thomas | Lilah | Lilah | Female | Woolton SC | |
| 97000370 | Thomas | Lili-rose | Lili-rose | 2013 | Female | Neath ASC |
| 1511551 | Thomas | Lilia-Faye | Lilia-Faye | 2007 | Female | Aberavon Swimming Club |
| 1483597 | Thomas | Liliana | Liliana | 2010 | Female | City of Sheffield Diving Club |
| 1378145 | Thomas | Lilla | Lilla | 2009 | Female | Bottisham SC |
| 1398022 | Thomas | Lilly | Lilly Marie | Female | Bracknell & Wokingham SC | |
| 97000529 | Thomas | Lilly-Grace | Lilly-Grace | 2010 | Female | Abergavenny Swimming Club |
| 1182059 | Thomas | Lilly-May | Lilly-May | 2004 | Female | Penyrheol ASC |
| 1393225 | Thomas | Lilwenna | Lil | 2010 | Female | City of Swansea Aquatics Club |
| 1136611 | Thomas | Lily | Lily | 2001 | Female | Bridgwater Amateur Swimming Club |
| 1521038 | Thomas | Lily | Lily | 2011 | Female | Bridgend Swim Club |
| 1590251 | Thomas | Lily | Lily | 2013 | Female | City Of Peterborough SC |
| 1613523 | Thomas | Lily | Makhoun | 2009 | Female | Oswestry Otters SC |
| 97006990 | Thomas | Lily | Lily | 2017 | Female | Haverfordwest |
| 97007316 | Thomas | Lily | Lily | 2013 | Female | Carmarthen |
| 1658530 | Thomas | Liv | Liv | Female | Norton-Radstock SC | |
| 1408700 | Thomas | Livia | Livia | 2009 | Female | City of Leeds Diving Club |
| 1410312 | Thomas | Livia | Livia | 2009 | Female | Pontypridd Swimming Club |
| 1694348 | Thomas | Livvy | Livvy | Female | Cheddar Kingfishers SC | |
| 1114034 | Thomas | Llio | Llio | 2002 | Female | Denbighshire Development Team |
| 1388275 | Thomas | Llio | Llio | 2008 | Female | Ruthin Rays |
| 370701 | Thomas | Lloyd | Lloyd | 1995 | Open/Male | Bridgend County Swim Squad |
| 75713 | Thomas | Lloyd | Lloyd | Open/Male | ||
| 797019 | Thomas | Lloyd | Lloyd | Open/Male | Stockton ASC | |
| 842866 | Thomas | Lloyd | Lloyd | 2002 | Open/Male | Tenby |
| 972808 | Thomas | Lloyd | Lloyd | 2005 | Open/Male | City of Swansea Aquatics Club |
| 1451151 | Thomas | Llyr | Llyr | 2008 | Open/Male | Amman Valley |
| 1253046 | Thomas | Logan | Logan | Open/Male | Beachfield Swimming Squad | |
| 1599036 | Thomas | Logan | Logan | 2012 | Open/Male | Aberdare Comets Diving Club |
| 1668325 | Thomas | Logan | Logan | Open/Male | Northgate Bridgnorth SC | |
| 1456962 | Thomas | Lois | Lois | Female | Middlesbrough SC | |
| 1620943 | Thomas | Lois | Lois | Female | Bere Regis & District SC | |
| 1515775 | Thomas | Lola | Lola | 2009 | Female | Portsmouth Northsea SC |
| 1607030 | Thomas | Lola | Lola | 2012 | Female | Newquay Cormorants SC |
| 1764712 | Thomas | Lola | Lola | 2014 | Female | Sandwell Diving Club |
| 1676310 | Thomas | Lola-Mae | Lola-Mae | Female | Ripley SC (rascals) | |
| 467804 | Thomas | Lorimer | Lorimer | 1999 | Open/Male | Wisbech Swimming Club |
| 1480442 | Thomas | Lottie | Lottie | 2011 | Female | Bridgend County Swim Squad |
| 1515112 | Thomas | Lou | Lou | 2005 | Female | Mount Kelly Swimming |
| 519401 | Thomas | Louis | Louis | Open/Male | Black Lion SC | |
| 883920 | Thomas | Louis | Louis | Open/Male | Hunstanton Sea Eagles | |
| 915985 | Thomas | Louis | Louis | Open/Male | Knutsford Amateur Swimming Club | |
| 1602957 | Thomas | Louisa | Louisa | 2006 | Female | Staines Swimming Club |
| 8356 | Thomas | Louise | Louise | Female | ||
| 1451502 | Thomas | Louise | Louise | Female | West End Therapeutic Swimming Cl | |
| 539766 | Thomas | Lowri | Lowri | 1997 | Female | Neath ASC |
| 1517613 | Thomas | Lowri | Lowri | 2010 | Female | Merthyr Tydfil Swimming Club |
| 1442558 | Thomas | Lowri Grace | Lowri | 2007 | Female | Holywell Swimming Club |
| 1115646 | Thomas | Luca | Luca | Open/Male | Windsor SC | |
| 1332717 | Thomas | Lucas | Lucas | 2008 | Open/Male | Swim Conwy |
| 1435924 | Thomas | Lucas | Lucas | Open/Male | Huddersfield Crusaders SC | |
| 97003301 | Thomas | Lucia | Lucia | 2013 | Female | Pontypridd Swimming Club |
| 97002393 | Thomas | Lucie | Lucie | 2008 | Female | Llanelli |
| 1493505 | Thomas | Lucien | Lucien | 2010 | Open/Male | Oswestry Otters SC |
| 1483806 | Thomas | Lucille | Lucille | Female | Consett SC | |
| 60384 | Thomas | Lucy | Lucy | 1991 | Female | Frome SC |
| 9999903400 | Thomas | Lucy | Lucy | Female | ||
| 9999919242 | Thomas | Lucy | Lucy | Female | ||
| 364482 | Thomas | Lucy | Lucy | 1999 | Female | City of Manchester WPC |
| 800559 | Thomas | Lucy | lucy | 1997 | Female | Pembrokeshire County Swimming |
| 874970 | Thomas | Lucy | Lucy | 1999 | Female | Selby Tigersharks Swimming Squad |
| 1139184 | Thomas | Lucy | Lucy | Female | Wandsworth SC | |
| 1167032 | Thomas | Lucy | Lucy | 2003 | Female | Haverfordwest |
| 1198804 | Thomas | Lucy | Lucy | 2004 | Female | ASKA (Chester) Swimming Club |
| 1263441 | Thomas | Lucy | Lucy | 2007 | Female | Leamington Spa SC |
| 1283437 | Thomas | Lucy | Lucy | 2005 | Female | Dyce (Aberdeen) ASC |
| 1345309 | Thomas | Lucy | Lucy | Female | South Axholme Sharks SC | |
| 1444881 | Thomas | Lucy | Lucy | 2003 | Female | Bridgend Swim Club |
| 1455667 | Thomas | Lucy | Lucy | 2010 | Female | Torridgeside SC |
| 1489681 | Thomas | Lucy | Lucy | Female | Dulwich Dolphins | |
| 1709354 | Thomas | Lucy | Lucy | 2012 | Female | Didcot & Barramundi SC |
| 1645578 | Thomas | Lucy Ann | Lucy Ann | 2013 | Female | Caerphilly County Swim Squad |
| 1295850 | Thomas | Luka | Luka | Open/Male | Cannock Phoenix Swimming Club | |
| 30707 | Thomas | Luke | Luke | 1991 | Open/Male | Aberaeron SC |
| 222516 | Thomas | Luke | Luke | 1990 | Open/Male | Cannock Phoenix Swimming Club |
| 20534 | Thomas | Luke | Luke | Open/Male | ||
| 67953 | Thomas | Luke | Luke | Open/Male | ||
| 749568 | Thomas | Luke | Luke | Open/Male | Otter SC | |
| 853367 | Thomas | Luke | Luke | 1999 | Open/Male | Llanelli |
| 873790 | Thomas | Luke | Luke | 1973 | Open/Male | Portsmouth Northsea SC |
| 1182083 | Thomas | Luke | Luke | 2006 | Open/Male | Llanelli |
| 1255371 | Thomas | Luke | Luke | 2003 | Open/Male | Wellington |
| 1291647 | Thomas | Luke | Luke | 2006 | Open/Male | Bristol Henleaze SC |
| 1305079 | Thomas | Luke | Luke | Open/Male | Crewe Flyers SC | |
| 1176605 | Thomas | Luke | Luke | 2007 | Open/Male | City of Swansea Aquatics Club |
| 1427899 | Thomas | Luke | Luke | 2012 | Open/Male | Nexus Valleys Swimming Club |
| 950123 | Thomas | Lydia | Lydia | 1998 | Female | Gloucester City SC |
| 1479691 | Thomas | Lyla | Lyla | 2008 | Female | City of Birmingham SC |
| 1712618 | Thomas | Lyra | Lyra | Female | Stevenage SC | |
| 1604336 | Thomas | Macey | Macey | Female | Leicester Sharks Swimming Club | |
| 1427968 | Thomas | Macy | Macy | 2009 | Female | City of Swansea Aquatics Club |
| 1387988 | Thomas | Maddy | Maddy | 2007 | Female | Bracknell & Wokingham SC |
| 945454 | Thomas | Madeleine | Madeleine | 2006 | Female | Winchester City Penguins |
| 1167433 | Thomas | Madison | Madison | 2006 | Female | Nexus Valleys Swimming Club |
| 1440771 | Thomas | Magi | Magi Glwys | 2008 | Female | Clwb Nofio P.B.P. |
| 1196459 | Thomas | Mai | Mai | Female | Cambridge University Swimming & | |
| 1612968 | Thomas | Mair | Mair | 2012 | Female | Market Drayton SC |
| 1296793 | Thomas | Maisie | Maisie | Female | Teddington SC | |
| 1353685 | Thomas | Maisie | Maisie | Female | Romiley Marina Swimming Club | |
| 1638674 | Thomas | Manisha | Manisha | 2012 | Female | Anaconda SC |
| 494872 | Thomas | Manon | Manon | 1996 | Female | Teifi Sharks |
| 1230740 | Thomas | Mared | Mared | 2004 | Female | Corwen Sharks |
| 1290843 | Thomas | Marisa | Marisa | 2006 | Female | City Of Oxford SC |
| 1438005 | Thomas | Marissa | Marissa | 2007 | Female | Richmond Dales ASC |
| 351588 | Thomas | Mark | Mark | 1991 | Open/Male | Borough of Kirklees SC |
| 656375 | Thomas | Mark | Mark | 1980 | Open/Male | Wrexham Aquatics |
| 1655866 | Thomas | Martha | Martha | Female | Bristol Henleaze SC | |
| 9999903787 | Thomas | Martin | Martin | Open/Male | ||
| 572 | Thomas | Martyn | Martyn | Open/Male | Cheltenham S & W P Club | |
| 62685 | Thomas | Mary | Elaine | 1960 | Female | Bridgend Swim Club |
| 1484303 | Thomas | Mason | Mason | 2011 | Open/Male | Celtic Dolphins |
| 1120948 | Thomas | Matilda | Tilly | 2003 | Female | Alton & District Swimming Club |
| 1234617 | Thomas | Matilda | Mattie | 2007 | Female | Dawlish SC |
| 1490826 | Thomas | Matilda | Matilda | Female | Rolls Royce SC | |
| 1650227 | Thomas | Matilda | Tilly | 2012 | Female | Derby Excel Swimming Club |
| 1667909 | Thomas | Matilda | Matilda | Female | Market Harborough SC | |
| 1757270 | Thomas | Matilda | Tilly | Female | Eastbourne SC | |
| 7913 | Thomas | Matt | Matt | 1983 | Open/Male | Kenilworth Masters SC |
| 25906 | Thomas | Matthew | Matthew | Open/Male | Truro City SC | |
| 161639 | Thomas | Matthew | Matthew | 1996 | Open/Male | Neath ASC |
| 351244 | Thomas | Matthew | Matthew | 1991 | Open/Male | Calverton and Bingham SC |
| 94474 | Thomas | Matthew | Matthew | Open/Male | ||
| 9999922342 | Thomas | Matthew | Matthew | Open/Male | ||
| 499293 | Thomas | Matthew | Craig | 1997 | Open/Male | Denbighshire Development Team |
| 720604 | Thomas | Matthew | Matthew | 1999 | Open/Male | Braintree & Bocking SC |
| 735369 | Thomas | Matthew | Matthew | 2001 | Open/Male | Worcester SC |
| 777190 | Thomas | Matthew | Matthew | Open/Male | Everton Swimming Assoc | |
| 803996 | Thomas | Matthew | Matthew | 2000 | Open/Male | Dorking Swimming Club |
| 88524 | Thomas | Matthew | Matthew | 1983 | Open/Male | Celtic Dolphins |
| 1461387 | Thomas | Matthew | Matthew | 2009 | Open/Male | Rugby SC |
| 1484173 | Thomas | Matthew | Matthew | 2009 | Open/Male | City Of Newport Swimming & Water |
| 1594773 | Thomas | Matthew | Matthew | 1974 | Open/Male | Reading SC |
| 1604604 | Thomas | Matthew | Matthew | Open/Male | Torridgeside SC | |
| 1718442 | Thomas | Matthew | Matthew | Open/Male | Tewkesbury SC | |
| 173639 | Thomas | Matthew Bryn | Matthew Bryn | Open/Male | ||
| 46504 | Thomas | Max | Max | 1992 | Open/Male | Hastings Seagull SC |
| 27437 | Thomas | Max | Max | Open/Male | ||
| 930797 | Thomas | Max | Max | Open/Male | Adwick (Doncaster) SC | |
| 1295381 | Thomas | Max | Max | 2006 | Open/Male | Flitwick Dolphins SC |
| 1486553 | Thomas | Max | Harrison | Open/Male | Frome SC | |
| 277995 | Thomas | Maximillian | Maximillian | Open/Male | Merton Pisces | |
| 1257453 | Thomas | Maya | Maya | Female | Blackpool Aquatics ASC | |
| 1368979 | Thomas | Maya | Maya | Female | Wimbledon Dolphins SC | |
| 90009187 | Thomas | Maya | Maya | Female | Orkney ASC | |
| 1452304 | Thomas | Maya | Maya | 2009 | Female | Afan Valley Swimming Club |
| 1512243 | Thomas | Maya | Maya | Female | Newquay Cormorants SC | |
| 1409584 | Thomas | Mazie | Mazie | Female | Mitcham Marlins Swimming Club | |
| 1596607 | Thomas | Meadow | Meadow | Female | Reading SC | |
| 1330180 | Thomas | Medi | Medi | 2008 | Female | Llanelli |
| 276006 | Thomas | Megan | Megan | 1997 | Female | Aberaeron SC |
| 557489 | Thomas | Megan | Megan | Female | Knutsford Amateur Swimming Club | |
| 731643 | Thomas | Megan | Megan | 1999 | Female | Gloucester City SC |
| 770466 | Thomas | Megan | Megan | Female | Gosport Dolphins SC | |
| 805188 | Thomas | Megan | Megan | 2001 | Female | Amman Valley |
| 825771 | Thomas | Megan | Megan | 1999 | Female | City of Cardiff |
| 836706 | Thomas | Megan | Megan | 2002 | Female | Tranent ASC |
| 848446 | Thomas | Megan | Megs | 2001 | Female | Chesham SC |
| 851814 | Thomas | Megan | Megan | 1998 | Female | Tredegar Torpedoes |
| 885987 | Thomas | Megan | Megan | 2001 | Female | Bramcote Swimming Club |
| 903084 | Thomas | Megan | Megan | 2002 | Female | Garston SC |
| 909325 | Thomas | Megan | Megan | 2003 | Female | Swansea Sharks |
| 925449 | Thomas | Megan | Megan | 2001 | Female | Swadlincote SC |
| 946120 | Thomas | Megan | Megan | 2003 | Female | Carmarthen |
| 964454 | Thomas | Megan | Megan | Female | Northgate Bridgnorth SC | |
| 1113405 | Thomas | Megan | Megan | 2001 | Female | Swim Bournemouth |
| 1497158 | Thomas | Megan | Megan | 2005 | Female | Oxford and Witney Artistic Swimm |
| 1240020 | Thomas | Megan | Megan | 2004 | Female | Aberystwyth and District Swimmin |
| 1328088 | Thomas | Megan | Megan | 2008 | Female | Daventry Dolphins SC |
| 1345621 | Thomas | Megan | Megan | Female | Epsom District SC | |
| 1413885 | Thomas | Megan | Megan | 2007 | Female | Welshpool Sharks |
| 1362720 | Thomas | Megan | Megan | 2005 | Female | Clwb Nofio P.B.P. |
| 1371551 | Thomas | Megan | Megan | 2008 | Female | Newtown Swimming Club |
| 1378078 | Thomas | Megan | Meg | 2006 | Female | Cinderford & District SC |
| 1399252 | Thomas | Megan | Megan | 2011 | Female | Soundwell SC |
| 1458473 | Thomas | Megan | Megan | 2007 | Female | Llanelli |
| 1203084 | Thomas | Megan | Megan | 2000 | Female | Warwick Water Polo Club |
| 1623236 | Thomas | Megan | Meg | 2010 | Female | Penarth Swimming and Water Polo |
| 27045 | Thomas | Meghan | Meghan | 1989 | Female | Swim Bournemouth |
| 809649 | Thomas | Meghan | Meghan | 2000 | Female | |
| 1672595 | Thomas | Meghan | Meghan | Female | Crewe Flyers SC | |
| 324550 | Thomas | Melanie | Melanie | 1994 | Female | Cardiff Masters |
| 9999913205 | Thomas | Melanie | Melanie | Female | ||
| 478224 | Thomas | Melissa | Melissa | 1998 | Female | Portobello ASC |
| 1317514 | Thomas | Melissa | Melissa | 1970 | Female | Asa Temporary cat 2 club |
| 875985 | Thomas | Melvin | Paul | 2000 | Open/Male | Caradon SC |
| 552419 | Thomas | Mia | Mia | 2000 | Female | Teddington SC |
| 1251937 | Thomas | Mia | Mia | 2005 | Female | Borough of Kirklees SC |
| 1189808 | Thomas | Mia | Mia | 2005 | Female | Abertillery Piranhas SC |
| 1406538 | Thomas | Mia | Mia | 2004 | Female | Bebington SC |
| 1514969 | Thomas | Mia | Mia | 2010 | Female | City of Cardiff |
| 1613606 | Thomas | Mia | Mia | 2012 | Female | Burntwood Swimming Club |
| 1623356 | Thomas | Mia | Mia | Female | Wallasey SC | |
| 97007369 | Thomas | Mia-Grace | Mimi | 2017 | Female | Neath ASC |
| 2191 | Thomas | Michael | Michael | 1982 | Open/Male | Cheltenham S & W P Club |
| 10786 | Thomas | Michael | Michael | 1989 | Open/Male | Leamington Spa SC |
| 9999902889 | Thomas | Michael | Michael | Open/Male | ||
| 9999925180 | Thomas | Michael | Michael | Open/Male | ||
| 541020 | Thomas | michael | michael | 1994 | Open/Male | Penley Swimming Club |
| 659 | Thomas | Michael | Mike | 1946 | Open/Male | Barnet Copthall SC |
| 1336700 | Thomas | Michael | Michael | Open/Male | Warwick Water Polo Club | |
| 1703963 | Thomas | Michelle | Michelle | Female | Boston Amateur SC | |
| 1377041 | Thomas | Mikyla | Mikyla | 2008 | Female | Bramcote Swimming Club |
| 355783 | Thomas | Miles | Miles | 2001 | Open/Male | Haverfordwest |
| 1686712 | Thomas | Miles | Miles | 2012 | Open/Male | Flitwick Dolphins SC |
| 1515105 | Thomas | Miley-Grace | Miley | 2011 | Female | Aberaeron SC |
| 1106197 | Thomas | Millicent | Milly | 2004 | Female | Chorley Marlins SC |
| 1228070 | Thomas | Millie | Millie | 2007 | Female | Pershore SC |
| 1298258 | Thomas | Millie | Millie | 2008 | Female | Godalming ASC |
| 1408363 | Thomas | Millie | Hannah | Female | Highworth ASC | |
| 1478638 | Thomas | Millie | Ella | Female | Southwell SC | |
| 97004591 | Thomas | Millie | Millie | 2015 | Female | City of Cardiff |
| 97003409 | Thomas | Millie | Millie | 2011 | Female | Amman Valley |
| 977764 | Thomas | Millie-Louise | Millie | 2003 | Female | Eastbourne SC |
| 1493872 | Thomas | Milo | Milo | 2008 | Open/Male | Orion SC |
| 1698013 | Thomas | Miya | Miya | 2011 | Female | Camden Swiss Cottage SC |
| 898067 | Thomas | Moli | Moli | 2000 | Female | Neath ASC |
| 1651695 | Thomas | Mollie | Mollie | 2012 | Female | Kendal SC |
| 467803 | Thomas | Molly | Molly | 2002 | Female | Wisbech Swimming Club |
| 865585 | Thomas | Molly | Molly | Female | Bradford-On-Avon ASC | |
| 895212 | Thomas | Molly | Molly | 2008 | Female | Dukinfield Marlins ASC |
| 973564 | Thomas | Molly | Molly | 2004 | Female | Gloucester City SC |
| 1314255 | Thomas | Molly | Molly | 2005 | Female | City of Bristol SC |
| 1352569 | Thomas | Molly | Molly | Female | Barnstaple SC | |
| 1435768 | Thomas | Molly | Molly | Female | Bicester Blue Fins SC | |
| 1684084 | Thomas | Molly May | Molly | Female | Ledbury & Malvern SC | |
| 1714411 | Thomas | Montgomery | Monty | Open/Male | Ware SC | |
| 516591 | Thomas | Morgan | Morgan | 1999 | Open/Male | Eckington SC |
| 810945 | Thomas | Morgan | Morgan | 2000 | Female | Llanelli |
| 1105086 | Thomas | Morgan | Morgan | 2004 | Open/Male | Welsh Individual Member |
| 1277454 | Thomas | Morgan | Morgan | 2005 | Female | City Of Newport Swimming & Water |
| 1403718 | Thomas | Morgan | Morgan | 2007 | Female | Holywell Swimming Club |
| 1481545 | Thomas | Morgan | Morgan | 2010 | Open/Male | Celtic Dolphins |
| 1632496 | Thomas | Morgan | Morgan | Open/Male | Great Yarmouth SC | |
| 1702361 | Thomas | Morgan | Morgan | 2016 | Open/Male | Repton Swimming |
| 1416916 | Thomas | Moritz | Moritz | Open/Male | City Of Oxford SC | |
| 832417 | Thomas | Mya | Mya | 2001 | Female | Tandridge Aquarius Swim Squad |
| 1388040 | Thomas | Mya | Mya | Female | Perry Beeches Triple SSC | |
| 1264600 | Thomas | Myla | Luka | Female | Cannock Phoenix Swimming Club | |
| 30838 | Thomas | Myles | Myles | Open/Male | ||
| 467802 | Thomas | Myles | Myles | Open/Male | Wisbech Swimming Club | |
| 56598 | Thomas | Nadine | Nadine | 1995 | Female | Pontypridd Swimming Club |
| 1328267 | Thomas | Nancy | Nancy | 2009 | Female | Ledbury & Malvern SC |
| 1371386 | Thomas | Nancy | Nancy | 2011 | Female | Wyre Forest SC |
| 1681553 | Thomas | Nancy | Nancy | Female | Gosport Dolphins SC | |
| 1312854 | Thomas | Nansi | Nansi | 2006 | Female | City of Cardiff |
| 1236227 | Thomas | Naomi | Naomi | Female | Dunmow Atlantis SC | |
| 1280937 | Thomas | Naomi | Naomi | 2007 | Female | Tring Swimming Club |
| 1414636 | Thomas | Naomi | Naomi | Female | Winsford Swimming Club | |
| 50317 | Thomas | Natalie | Natalie | 1987 | Female | Swim Bournemouth |
| 92322 | Thomas | Natalie | Natalie | Female | ||
| 9999800746 | Thomas | Natalie | Natalie | Female | ||
| 9999913741 | Thomas | Natalie | Natalie | Female | ||
| 23846 | Thomas | Natasha | Natasha | Female | ||
| 1573126 | Thomas | Natasha | Natasha | 2009 | Female | Llanelli |
| 9999903926 | Thomas | Nathalie | Nathalie | Female | ||
| 46500 | Thomas | Nathan | Nathan | 1991 | Open/Male | Hastings Seagull SC |
| 922348 | Thomas | Nathan | Nathan | 2003 | Open/Male | Warrington Warriors SC |
| 1193619 | Thomas | Nathan | Nathan | 2005 | Open/Male | Preston Swimming Club |
| 1439525 | Thomas | Nathan | Nathan | 1974 | Open/Male | Bicester Blue Fins SC |
| 1578884 | Thomas | Nathaniel | Nathaniel | 2009 | Open/Male | Woodside & Thornton Heath SC |
| 1635024 | Thomas | Nathaniel | Nathaniel | Open/Male | Streatham SC | |
| 1732088 | Thomas | Nathaniel | Nathaniel | Open/Male | Sid Vale SC | |
| 1490540 | Thomas | Neeve | Neeve | 2013 | Female | Rhondda |
| 1257761 | Thomas | Neil | Neil | Open/Male | Accrington SC | |
| 1457234 | Thomas | Neil | Neil | Open/Male | City of Chester Swimming Club | |
| 1632654 | Thomas | Neil | Neil | Open/Male | Isle Of Wight Marlins Swim Club | |
| 97006444 | Thomas | Nel Gwilym | Nel Gwilym | 2017 | Female | Clwb Nofio Caernarfon |
| 1190686 | Thomas | Nell | Nell | 2004 | Female | Rhondda Cynon Taf Performance Sw |
| 1167836 | Thomas | Neve | Neve | Female | Blackpool Aquatics ASC | |
| 76744 | Thomas | Nia | Nia | 1994 | Female | Bridgend County Swim Squad |
| 842897 | Thomas | Nia | Nia | 2000 | Female | Clwb Nofio Ynys Môn | Isle of An |
| 1273028 | Thomas | Nia | Nia | 2004 | Female | Barry ASC |
| 97005910 | Thomas | Nia | Nia | 2012 | Female | City Of Newport Swimming & Water |
| 522587 | Thomas | Niamh | Niamh | 2001 | Female | City Of Newport Swimming & Water |
| 75710 | Thomas | Nicholas | Nicholas | Open/Male | ||
| 91963 | Thomas | Nicholas | Nicholas | Open/Male | ||
| 1356359 | Thomas | Nicholas | Nicholas | 2007 | Open/Male | Basingstoke Bluefins SC |
| 1493105 | Thomas | Nicholas | Nicholas | Open/Male | Thurrock Swimming Club | |
| 443251 | Thomas | Nick | Nick | 1984 | Open/Male | Bridgend County Swim Squad |
| 239907 | Thomas | Nicola | Nicole | 1995 | Female | Warley Wasps SC |
| 420630 | Thomas | Nicola | Nicola | 1998 | Female | Bilston SC |
| 9999921099 | Thomas | Nicola | Nicola | Female | ||
| 9999925166 | Thomas | Nicola | Nicola | Female | ||
| 97004427 | Thomas | Nicola | Nicola | 1984 | Female | Pembroke & District ASC |
| 9999906179 | Thomas | Nicole | Nicole | Female | ||
| 1573123 | Thomas | Nikita | Nikita | 2009 | Female | Llanelli |
| 1458746 | Thomas | Nikki | Nikki | 1984 | Female | Cambridge Dive Team |
| 97004053 | Thomas | Noa Jac | Noa Jac | 2011 | Open/Male | Carmarthen Water Polo Club |
| 1296568 | Thomas | Noah | Noah | 2006 | Open/Male | Nottingham Leander SC |
| 1361927 | Thomas | Noah | Noah | 2005 | Open/Male | Llanelli |
| 1388277 | Thomas | Noah | Noah | 2009 | Open/Male | Celtic Dolphins |
| 1639370 | Thomas | Noah | Noah | Open/Male | Plymouth Leander SC | |
| 1312309 | Thomas | Noel | Noel | Open/Male | Loddon White Dolphin SC | |
| 1524556 | Thomas | Nuala | Nuala | Female | City of Cambridge SC | |
| 1311933 | Thomas | Nyall | Nyall | 2008 | Open/Male | Rhondda |
| 1379634 | Thomas | Nyla | Nyla | 2007 | Female | Neath ASC |
| 1371387 | Thomas | Olive | Olive | 2010 | Female | Wyre Forest SC |
| 9880 | Thomas | Oliver | Oliver | Open/Male | Arun Tridents SC | |
| 311887 | Thomas | Oliver | Oliver | 1997 | Open/Male | Llanelli |
| 88709 | Thomas | Oliver | Oliver | Open/Male | ||
| 9999928227 | Thomas | Oliver | Oliver | Open/Male | ||
| 896913 | Thomas | Oliver | Oliver | 2002 | Open/Male | East Grinstead Swimming Club |
| 1213073 | Thomas | Oliver | Oliver | Open/Male | Star Diving Club Guildford | |
| 1423162 | Thomas | Oliver | Oliver | 2009 | Open/Male | Aquabears Of Rochdale SC |
| 1330496 | Thomas | Oliver | Oliver | Open/Male | Grantham Water Polo Club | |
| 1331634 | Thomas | Oliver | Oliver | Open/Male | Stockton ASC | |
| 1417978 | Thomas | Oliver | Oliver | Open/Male | Alton & District Swimming Club | |
| 1336220 | Thomas | Oliver | Oliver | 2009 | Open/Male | Rhyl Dolphins SC |
| 1379639 | Thomas | Oliver | Oliver | 2008 | Open/Male | Neath ASC |
| 1478698 | Thomas | Oliver | Oliver | 2010 | Open/Male | Larkfield SC |
| 1660400 | Thomas | Oliver | Oliver | 2011 | Open/Male | Dartford District SC |
| 1730533 | Thomas | Oliver | Oliver | 2012 | Open/Male | Southampton Diving Academy |
| 1747374 | Thomas | Oliver | Oliver | Open/Male | Marlborough Penguins ASC | |
| 299077 | Thomas | Olivia | Olivia | 1997 | Female | Bridgend County Swim Squad |
| 759203 | Thomas | Olivia | Olivia | 1996 | Female | Caerphilly County Swim Squad |
| 841263 | Thomas | Olivia | Olivia | 2002 | Female | Penyrheol ASC |
| 875138 | Thomas | Olivia | Oli | 2002 | Female | Portsmouth Victoria SC |
| 960016 | Thomas | Olivia | Olivia | Female | Biggleswade SC | |
| 1114761 | Thomas | Olivia | Olivia | 2001 | Female | Borough of Barnsley SC |
| 1176039 | Thomas | Olivia | Olivia | 2004 | Female | Epping Forest Dist SC |
| 1263666 | Thomas | Olivia | Olivia | Female | Chislehurst Millennium Swim Squa | |
| 1357539 | Thomas | Olivia | Olivia | Female | Paignton SC | |
| 1388792 | Thomas | Olivia | Olivia | Female | Long Eaton SC | |
| 1399268 | Thomas | Olivia | Olivia | Female | Wandsworth SC | |
| 1427081 | Thomas | Olivia | Olivia | Female | Bristol Henleaze SC | |
| 1444338 | Thomas | Olivia | Olivia | 2008 | Female | City Of Newport Swimming & Water |
| 1451044 | Thomas | Olivia | Olivia | 1999 | Female | Cardiff Metropolitan University |
| 1476019 | Thomas | Olivia | Olivia | Female | Torquay Leander SC | |
| 1487771 | Thomas | Olivia | Olivia | 2010 | Female | Stafford Apex SC |
| 1584018 | Thomas | Olivia | Olivia | 2011 | Female | Basingstoke Bluefins SC |
| 1649709 | Thomas | Olivia | Olivia | 2013 | Female | Worcester SC |
| 1668208 | Thomas | Olivia | Olivia | Female | Derby Excel Swimming Club | |
| 1708027 | Thomas | Olivia | Olivia | 2016 | Female | City Of Peterborough SC |
| 1761065 | Thomas | Olivia | Olivia | Female | Chippenham ASC | |
| 1355725 | Thomas | Olly | Olly | Open/Male | Boldon C.A. Swim Club | |
| 1595857 | Thomas | Orla | Orla | 2008 | Female | South Croydon SC |
| 1692344 | Thomas | Orla | Orla | Open/Male | Tonbridge SC | |
| 1618104 | Thomas | Orlaith | Orlaith | 2013 | Female | Rugby SC |
| 1195583 | Thomas | Oscar | Oscar | Open/Male | Poole SC | |
| 1588136 | Thomas | Oscar | Oscar | 2013 | Open/Male | Aquabears Of Rochdale SC |
| 1658383 | Thomas | Oscar | Oscar | 2012 | Open/Male | Royston SC |
| 1133295 | Thomas | Osian | Osian | 2004 | Open/Male | Carmarthen |
| 1667557 | Thomas | Osian | Osian | 2012 | Open/Male | Witney & District SC |
| 1505577 | Thomas | Otto | Otto | 2009 | Open/Male | Clwb Nofio Bangor Swim Club |
| 384002 | Thomas | Owain | Owain | 1996 | Open/Male | City of Cardiff |
| 463743 | Thomas | Owain | Owain | 1997 | Open/Male | Llanelli |
| 869627 | Thomas | Owain | Owain | 2000 | Open/Male | Clwb Nofio Caernarfon |
| 1134369 | Thomas | Owain | Owain | 1999 | Open/Male | Penarth Swimming and Water Polo |
| 1707085 | Thomas | Owain | Owain | Open/Male | Bridport Barracuda | |
| 38871 | Thomas | Owen | Owen | 1992 | Open/Male | City of Cardiff |
| 435115 | Thomas | Owen | Owen | 1999 | Open/Male | Tenby |
| 454957 | Thomas | Owen | Owen | 1998 | Open/Male | Leek ASC |
| 727756 | Thomas | Owen | Owen | 1999 | Open/Male | University of Nottingham SC |
| 1132823 | Thomas | Owen | Owen | 2004 | Open/Male | Bedford Swim Squad |
| 1135675 | Thomas | Owen | Owen | 2004 | Open/Male | Braintree & Bocking SC |
| 1229992 | Thomas | Owen | Owen | 2003 | Open/Male | North Norfolk Vikings SC |
| 1362120 | Thomas | Owen | Owen | 2007 | Open/Male | Hart Swimming Club |
| 1375351 | Thomas | Owen | Owen | Open/Male | Stalybridge SC | |
| 1429890 | Thomas | Owen | Owen | Open/Male | Loddon White Dolphin SC | |
| 1453886 | Thomas | Owen | Owen | 2006 | Open/Male | Barry ASC |
| 1454684 | Thomas | Owen | Owen | Open/Male | Devonport RSA | |
| 1658036 | Thomas | Owen | Owen | Open/Male | Retford SC | |
| 529221 | Thomas | Paige | Paige | Female | City Of Rochester S&LGC | |
| 903613 | Thomas | Paige | Paige | 2005 | Female | Penley Swimming Club |
| 1520673 | Thomas | Paul | Paul | Open/Male | Halton SC | |
| 23001 | Thomas | Paula | Paula | Female | Wellingborough SC | |
| 1725577 | Thomas | Pearl | Pearl | 2014 | Female | New Earswick SC |
| 1401351 | Thomas | Peggy | Peggy | 2013 | Female | Wyre Forest SC |
| 1582508 | Thomas | Penelope | Penny | Female | Wildern Waves | |
| 1651442 | Thomas | Perri | Perri | Female | Hillingdon Swimming Club | |
| 1745083 | Thomas | Perri | Perri | 2014 | Female | Hillingdon Swimming Club |
| 5402 | Thomas | Peter | Peter | 1959 | Open/Male | Hatfield SC |
| 1283748 | Thomas | Peter | Peter | Open/Male | Brighton SC | |
| 1671825 | Thomas | Peter | Peter | Open/Male | Aylesbury & District SC | |
| 75739 | Thomas | Philip | Joseph | 1995 | Open/Male | Aberavon Swimming Club |
| 354773 | Thomas | Philip | Philip | 1994 | Open/Male | Bristol Henleaze SC |
| 504886 | Thomas | Philip | Phil | 1962 | Open/Male | Manchester TC Swimming Club |
| 48416 | Thomas | Philippa | Philippa | Female | City of Cambridge SC | |
| 873486 | Thomas | Philippa | Pippa | 1999 | Female | Arun Tridents SC |
| 1235627 | Thomas | Philippa | Philippa | 2005 | Female | Sheffield City SC |
| 97004099 | Thomas | Philippa | Philippa | 2009 | Female | Abergavenny Swimming Club |
| 9999924850 | Thomas | Phillip | Phillip | Open/Male | ||
| 1617064 | Thomas | Phillip | Phillip | 1997 | Open/Male | Southport SC |
| 1226706 | Thomas | Phoebe | Phoebe | 2005 | Female | City of Bristol SC |
| 1458897 | Thomas | Phoebe | Phoebe | Female | Torquay Leander SC | |
| 1641827 | Thomas | Phoebe | Phoebe | Female | Wellington (Telford) SC | |
| 97003967 | Thomas | Phoebe | Phoebe | 2014 | Female | City of Cardiff |
| 902537 | Thomas | Polly | Polly | Female | Kent Weald Swim Squad | |
| 1393854 | Thomas | Poppy | Poppy | 2005 | Female | Tilehurst SC |
| 1498396 | Thomas | Poppy | Poppy | 2010 | Female | City of Cardiff |
| 97002186 | Thomas | Poppy | Pops | 2013 | Female | Llandudno Swimming |
| 189645 | Thomas | Rachael | Rachael | Female | Chippenham ASC | |
| 1483807 | Thomas | Rachata | Joe | 2007 | Open/Male | Consett SC |
| 75660 | Thomas | Rachel | Rachel | 1991 | Female | Aberavon Swimming Club |
| 9999915250 | Thomas | Rachel | Rachel | Female | ||
| 541021 | thomas | rachel | rachel | 1995 | Female | Penley Swimming Club |
| 496781 | Thomas | Rachel | Rachel | 1998 | Female | Motherwell & Wishaw ASC |
| 1232952 | Thomas | Rachel | Rachel | Female | Rainhill & District SC | |
| 1709345 | Thomas | Rachel | Rachel | 1981 | Female | Didcot & Barramundi SC |
| 1749423 | Thomas | Rafe | Rafe | Open/Male | Beaumont Diving Academy | |
| 1311303 | Thomas | Rafferty | Rafferty | Open/Male | Winchester City Penguins | |
| 1507403 | Thomas | Ralph | Ralph | 2012 | Open/Male | Exeter City Swimming Club |
| 97005544 | Thomas | Ralph | Ralph | 2015 | Open/Male | Holywell Swimming Club |
| 76070 | Thomas | Rebecca | Rebecca | Female | City of Swansea Aquatics Club | |
| 77383 | Thomas | Rebecca | Rebecca | 1993 | Female | City of Cardiff |
| 160702 | Thomas | Rebecca | Rebecca | Female | Crosby SC | |
| 161700 | Thomas | Rebecca | Rebecca | 1997 | Female | Llanelli |
| 311637 | Thomas | Rebecca | Rebecca | 1995 | Female | Bridgend County Swim Squad |
| 355467 | Thomas | Rebecca | Rebecca | 1998 | Female | Cheltenham S & W P Club |
| 16997 | Thomas | Rebecca | Rebecca | Female | ||
| 89388 | Thomas | Rebecca | Rebecca | Female | ||
| 251395 | Thomas | Rebecca | Becky | 1993 | Female | Devonport RSA |
| 800113 | Thomas | Rebecca | Rebecca | Female | Teddington SC | |
| 860138 | Thomas | Rebecca | Rebbeca | Female | Barrow Long Distance SC | |
| 1139404 | Thomas | Rebecca | Rebecca | 2003 | Female | Biddulph SC |
| 1347672 | Thomas | Rebecca | Rebecca | 1991 | Female | West London Penguin Swimming & W |
| 1408034 | Thomas | Rebecca | Rebecca | Female | Withnell SC | |
| 428145 | Thomas | Rebekah | Rebekah | 1997 | Female | City of Swansea Aquatics Club |
| 177358 | Thomas | Reece | Reece | Open/Male | ||
| 1443938 | Thomas | Reece | Reece | 2011 | Open/Male | Northgate Bridgnorth SC |
| 1481771 | Thomas | Reece | Reece | Open/Male | Chalfont Otters SC | |
| 1408830 | Thomas | Reeve | Reeve | 2005 | Open/Male | Neath ASC |
| 1574255 | Thomas | Reggie | Reggie | Open/Male | Leicester Sharks Swimming Club | |
| 1207599 | Thomas | Reuben | Reuben | Open/Male | Tigers SC (Jersey) Ltd | |
| 1342560 | Thomas | Reuben | Reuben | 2009 | Open/Male | Mount Kelly Swimming |
| 1682541 | Thomas | Reuben | Reuben | Open/Male | Beckenham SC | |
| 31791 | Thomas | Rhian | Rhian | Female | Bridgend County Swim Squad | |
| 5250 | Thomas | Rhian | Rhian | Female | ||
| 1248768 | Thomas | Rhian | Rhian | 2008 | Female | Haverfordwest |
| 42681 | Thomas | Rhianmor | Rhianmor | Female | Harpenden Swimming Club | |
| 1529808 | Thomas | Rhianna | Rhia | Female | Exeter City Swimming Club | |
| 25365 | Thomas | Rhianne | Rhianne | 1988 | Female | Anaconda SC |
| 1158604 | Thomas | Rhiannon | Rhiannon | 2007 | Female | Windsor SC |
| 1174883 | Thomas | Rhiannon | Rhiannon | 2004 | Female | Lincoln Vulcans SC |
| 1762460 | Thomas | Rhiannon | Rhiannon | 2014 | Female | Poole SC |
| 324559 | Thomas | Rhodri | Rhodri | Open/Male | City of Cardiff | |
| 30991 | Thomas | Rhys | Rhys | Open/Male | University of Bath WPC | |
| 51220 | Thomas | Rhys | Rhys | 1994 | Open/Male | Llanelli |
| 67065 | Thomas | Rhys | Rhys | 1993 | Open/Male | Maidstone SC |
| 74083 | Thomas | Rhys | Rhys | 1994 | Open/Male | Llandarcy ASC |
| 347966 | Thomas | Rhys | Rhys | 1999 | Open/Male | |
| 39972 | Thomas | Rhys | Rhys | Open/Male | ||
| 50999 | Thomas | Rhys | Rhys | Open/Male | ||
| 1191607 | Thomas | Rhys | Rhys | 2005 | Open/Male | City of Swansea Aquatics Club |
| 1277713 | Thomas | Rhys | Rhys | Open/Male | March Marlins SC | |
| 1309181 | Thomas | Rhys | Rhys | 2010 | Open/Male | Neath ASC |
| 1484563 | Thomas | Rhys | Rhys | 2010 | Open/Male | Haverfordwest |
| 1491603 | Thomas | Rhys | Rhys | 2008 | Open/Male | Linslade Crusaders Swimming Club |
| 1596242 | Thomas | Rhys | Rhys | Open/Male | Sittingbourne & Milton SC | |
| 97002544 | Thomas | Rhys | Rhys | 2011 | Open/Male | Afan Valley Swimming Club |
| 4178 | Thomas | Richard | Richard | Open/Male | Gosport Dolphins SC | |
| 9999924297 | Thomas | Richard | Richard | Open/Male | ||
| 502699 | Thomas | Richard | Richard | Open/Male | Salford City SC | |
| 873605 | Thomas | Richard | Richard | 1954 | Open/Male | Chichester (Cormorant) SC |
| 1227710 | Thomas | Richard | Richard | Open/Male | Hoddesdon SC | |
| 1753823 | Thomas | Richard | Richard | Open/Male | Torridgeside SC | |
| 1453760 | Thomas | Rico | Rico | 2004 | Open/Male | Bor of Waltham Forest (Gators) |
| 1629664 | Thomas | Riley | Riley | 2013 | Open/Male | Heads of the Valleys |
| 1690157 | Thomas | Riley | Riley | 2012 | Open/Male | Truro City SC |
| 31907 | Thomas | Rita | Rita | 1932 | Female | Colwyn Bay |
| 770 | Thomas | Robert | Robert | 1943 | Open/Male | Otter SC |
| 9999906875 | Thomas | Robert | Robert | Open/Male | ||
| 9999914669 | Thomas | Robert | Robert | Open/Male | ||
| 517621 | Thomas | Robert | Robert | Open/Male | Fishguard Flyers | |
| 90029812 | Thomas | Robert | Robert | 2005 | Open/Male | |
| 930256 | Thomas | Robyn | Robyn | 2001 | Female | Fishguard Flyers |
| 1596598 | Thomas | Rocko | Rocko | Open/Male | Reading SC | |
| 1501252 | Thomas | Rohan | Rohan | 2010 | Open/Male | Bridgend Swim Club |
| 9999911360 | Thomas | Romanie | Romanie | Female | ||
| 1491689 | Thomas | Romee | Romee | 2010 | Open/Male | Aberavon Swimming Club |
| 856866 | Thomas | Romy | Romy | Female | Kingston Royals SC | |
| 1260058 | Thomas | Ronia | Ronia | Female | Exeter City Swimming Club | |
| 1636718 | Thomas | Ronnie | Ronnie | Open/Male | Redditch SC | |
| 1445570 | Thomas | Rory | Rory | Open/Male | Bristol Henleaze SC | |
| 1761147 | Thomas | Rory | Rory | Open/Male | Rugby SC | |
| 1665001 | Thomas | Rose | Rose | Female | Exeter City Swimming Club | |
| 1740946 | Thomas | Roshni | Roshni | 2012 | Female | Hemel Hempstead SC |
| 528920 | Thomas | Rosie | Rosie | 1998 | Female | Maxwell SC |
| 850277 | Thomas | Rosie | Rosie | 2000 | Female | Beckenham SC |
| 1230997 | Thomas | Rosie | Rosie | Female | Rugby SC | |
| 1292052 | Thomas | Rosie | Rosie | 2005 | Female | Penzance SA and WPC |
| 367601 | Thomas | Rosie | Rosie | Female | East Dorset Open Water SC | |
| 754704 | Thomas | Rowan | Rowan | 1998 | Female | Camden Swiss Cottage SC |
| 1151593 | Thomas | Rowan | Rowan | 2004 | Open/Male | Kingston ASC |
| 1613469 | Thomas | Rowan | Rowan | 2011 | Open/Male | Carn Brea and Helston SC |
| 1634499 | Thomas | Rowan | Rowan | 2013 | Open/Male | Flixton SC |
| 1639827 | Thomas | Rowan | Rowan | 2012 | Open/Male | Bromsgrove SC |
| 1140867 | Thomas | Ruby | Ruby | 2003 | Female | Staines Swimming Club |
| 1165515 | Thomas | Ruby | Ruby | 2001 | Female | Gainsborough Dolphins SC |
| 1167626 | Thomas | Ruby | Ruby | 2004 | Female | Newtown Swimming Club |
| 1282825 | Thomas | Ruby | Ruby | Female | Highworth ASC | |
| 1418445 | Thomas | Ruby | Ruby | Female | Tunbridge Wells Diving Club | |
| 1362395 | Thomas | Ruby | Ruby | 2008 | Female | Winsford Swimming Club |
| 1381729 | Thomas | Ruby | Ruby | Female | Reading SC | |
| 1444873 | Thomas | Ruby | Ruby | 2005 | Female | Bridgend County Swim Squad |
| 1453435 | Thomas | Ruby | Ruby | 2007 | Female | Llanelli Lightening Diving Club |
| 1488254 | Thomas | Ruby | Ruby | Female | Burntwood Swimming Club | |
| 1700026 | Thomas | Ruby | Grace | Female | Dinnaton SC | |
| 1499769 | Thomas | Ruby-Rose | Ruby-Rose | 2009 | Female | Ledbury & Malvern SC |
| 1305024 | Thomas | Rufus | Rufus | 2004 | Open/Male | City of Bristol SC |
| 1750282 | Thomas | Rupert | Rupert | Open/Male | Preston Swimming Club | |
| 56300 | Thomas | Russel | Russ | 1948 | Open/Male | Welsh Wanderers |
| 173638 | Thomas | Ryan | Ryan | 1995 | Open/Male | Blackburn Centurion SC |
| 89751 | Thomas | Ryan | Ryan | Open/Male | ||
| 838487 | Thomas | Ryan | Ryan | 2004 | Open/Male | Gosport Dolphins SC |
| 906893 | Thomas | Ryan | Ryan | 2002 | Open/Male | Carmarthen |
| 1218509 | Thomas | Ryan | Ryan | 2004 | Open/Male | Evesham SC |
| 1260057 | Thomas | Ryan | Ryan | 2009 | Open/Male | Exeter City Swimming Club |
| 1262724 | Thomas | Ryan | Ryan | Open/Male | March Marlins SC | |
| 1276880 | Thomas | Ryan | Ryan | Open/Male | Worthing Swimming Club | |
| 1311174 | Thomas | Ryan | Ryan | 2008 | Open/Male | Preston Swimming Club |
| 1491652 | Thomas | Ryan | Ryan | Open/Male | Kingsbury Aquarius SC | |
| 1505573 | Thomas | Ryan | Caio | 2006 | Open/Male | Amman Valley |
| 1662432 | Thomas | Ryan | Ryan | 1985 | Open/Male | Fareham Nomads SC |
| 9999918193 | Thomas | Sabrina | Sabrina | Female | ||
| 1242505 | Thomas | Sacha | Sacha | 2003 | Female | Norwich Swan SC |
| 238242 | Thomas | Sally | Sally | Female | Corsham A.S.C. | |
| 397805 | Thomas | Sam | Sam | 1994 | Open/Male | Taunton Deane SC |
| 9999916936 | Thomas | Sam | Sam | Open/Male | ||
| 537315 | Thomas | Sam | Sam | 1997 | Open/Male | City of Swansea Aquatics Club |
| 811818 | Thomas | Sam | Sam | 1999 | Open/Male | Wrexham Swimming Club |
| 1190687 | Thomas | Sam | Sam | 2004 | Open/Male | Rhondda Cynon Taf Performance Sw |
| 1593272 | Thomas | Sam | Sam | 2007 | Open/Male | Cwmbran |
| 64542 | Thomas | Samantha | Samantha | Female | ||
| 38760 | Thomas | Samantha | Samantha | Female | ||
| 58018 | Thomas | Samantha | Samantha | Female | ||
| 1263725 | Thomas | Samantha | Samantha | 2006 | Female | Deepings SC |
| 1347374 | Thomas | Sammie | Sammie | Open/Male | Corsham A.S.C. | |
| 226531 | Thomas | Samuel | Sam | 1993 | Open/Male | Lydney SC |
| 276847 | Thomas | Samuel | Samuel | 1994 | Open/Male | Gosport Dolphins SC |
| 475671 | Thomas | Samuel | Samuel | 1997 | Open/Male | Harrogate District SC |
| 757015 | Thomas | Samuel | Sam | Open/Male | Bollington Phoenix SC | |
| 906842 | Thomas | Samuel | Sam | 2000 | Open/Male | Neath ASC |
| 929155 | Thomas | Samuel | Samuel | 2004 | Open/Male | Windsor SC |
| 964453 | Thomas | Samuel | Sam | Open/Male | Northgate Bridgnorth SC | |
| 1134745 | Thomas | Samuel | Samuel | 2004 | Open/Male | Stockport Metro SC |
| 1183037 | Thomas | Samuel | Samuel | 2003 | Open/Male | Corby ASC |
| 1256170 | Thomas | Samuel | Samuel | Open/Male | Warrington Swimming Club | |
| 1321045 | Thomas | Samuel | Sam | 2002 | Open/Male | Thirsk White Horse Swim Team |
| 1322004 | Thomas | Samuel | Samual | 2006 | Open/Male | City of Leeds Diving Club |
| 1485293 | Thomas | Samuel | Samuel | Open/Male | Rushcliffe SC | |
| 1487758 | Thomas | Samuel | Samuel | Open/Male | Kingston Royals SC | |
| 90032032 | Thomas | Samuel | Samuel | Open/Male | Heart Of Midlothian ASC | |
| 1605664 | Thomas | Samuel | Sam | Open/Male | Exeter City Swimming Club | |
| 91942 | Thomas | Sara | Sara | Female | ||
| 727679 | Thomas | Sara | Sarah | 2001 | Female | Amman Valley |
| 1628169 | Thomas | Sara | Sara | 2013 | Female | Clwb Nofio Bangor Swim Club |
| 35032 | Thomas | Sarah | Sarah | 1992 | Female | Calverton and Bingham SC |
| 67815 | Thomas | Sarah | Sarah | 1987 | Female | Bodmin Dragons SC |
| 215248 | Thomas | Sarah | Sarah | Female | Okehampton Otters SC | |
| 9999800747 | Thomas | Sarah | Sarah | Female | ||
| 9999918965 | Thomas | Sarah | Sarah | Female | ||
| 9999927269 | Thomas | Sarah | Sarah | Female | ||
| 440992 | Thomas | Sarah | Sarah | 1976 | Female | Asa Temporary cat 2 club |
| 1372725 | Thomas | Sarah | Sarah | 2007 | Female | Hatfield SC |
| 1624991 | Thomas | Sarah | Sarah | 1991 | Female | Cardiff Masters |
| 903527 | Thomas | Sasha | Sasha | 2001 | Female | Wrexham Swimming Club |
| 1523100 | Thomas | Saskia | Saskia | Female | Onward Dolphin SC | |
| 1403843 | Thomas | Scarlet | Scarlet | Female | Rolls Royce SC | |
| 1163998 | Thomas | Scarlett | Scarlett | 2002 | Female | Portsmouth Northsea SC |
| 1649459 | Thomas | Scarlett | Scarlett | Female | Durrington Otters | |
| 31262 | Thomas | Scott | Scott | Open/Male | ||
| 31382 | Thomas | Scott | Scott | Open/Male | ||
| 737726 | Thomas | Scott | Scott | 1999 | Open/Male | Asa Temporary cat 2 club |
| 927024 | Thomas | Scott | Scott | 2002 | Open/Male | Chelmsford City SC |
| 1255370 | Thomas | Scott | Scott | 2005 | Open/Male | Wellington |
| 33361 | Thomas | Sean | Sean | Open/Male | ||
| 932314 | Thomas | Sean | Sean | 2000 | Open/Male | City of Chester Swimming Club |
| 759235 | Thomas | Sebastian | Sebastian | 1999 | Open/Male | Brompton SC |
| 1238525 | Thomas | Sebastian | Sebastian | 2006 | Open/Male | Chase SC |
| 1619177 | Thomas | Sebatian | Seb | 2010 | Open/Male | Northern Celts |
| 805176 | Thomas | Seren | Seren | 2001 | Female | Carmarthen |
| 1123344 | Thomas | Seren | Seren | 2004 | Female | Amman Valley |
| 1150138 | Thomas | Seren | Seren | 2006 | Female | City of Swansea Aquatics Club |
| 1406162 | Thomas | Seren | Seren Grace | Female | Blandford SC | |
| 1451146 | Thomas | Seren | Seren | 2009 | Female | Carn Brea and Helston SC |
| 1624975 | Thomas | Seren | Seren | 2010 | Female | Amman Valley |
| 97000533 | Thomas | Seren | Seren | 2012 | Female | Barry ASC |
| 97005080 | Thomas | Seren | Seren | 2014 | Female | City of Cardiff |
| 1461998 | Thomas | Serenity | Serenity | 2010 | Female | Llandudno Swimming |
| 1718629 | Thomas | Serik | Serik | Open/Male | Tonbridge SC | |
| 1623429 | Thomas | Seth | Seth | Open/Male | St Austell ASC | |
| 297361 | Thomas | Shan | Shan | Female | Mid Sussex Marlins | |
| 753794 | Thomas | Shannon | Shannon | Female | City of Hereford SC | |
| 1116034 | Thomas | Sharna | Sharna | 2001 | Female | Reading SC |
| 31100 | Thomas | Shaun | Shaun | Open/Male | ||
| 920645 | Thomas | Shaun | Shaun | 2001 | Open/Male | Colchester SC |
| 1229405 | Thomas | Shay | Shay | 2006 | Open/Male | Swim Conwy |
| 1500532 | Thomas | Shon | Shon | Open/Male | Exeter City Swimming Club | |
| 1494011 | Thomas | Shona | Shona | Female | Exeter City Swimming Club | |
| 47770 | Thomas | Sian | Sian | Female | Llanelli | |
| 51418 | Thomas | Sian | Sian | Female | Carmarthen | |
| 364261 | Thomas | Sian | Sian | 2000 | Female | Denbighshire Development Team |
| 9999921537 | Thomas | Simon | Simon | Open/Male | ||
| 502978 | Thomas | Simon | Simon | 1998 | Open/Male | Deepings SC |
| 1348540 | Thomas | Sion | Sion | 2009 | Open/Male | Haverfordwest |
| 512723 | Thomas | Siriol Ifan | Siriol Ifan | 1997 | Female | Teifi Sharks |
| 1757900 | Thomas | Sofie | Sofie | Female | Doncaster Dartes SC | |
| 1673703 | Thomas | Solomon | Solomon | Open/Male | Bristol Penguin Olympic SC | |
| 1246698 | Thomas | Sonny | Sonny | 2006 | Open/Male | Leander SC |
| 1402614 | Thomas | Sonny | Sonny | 2010 | Open/Male | Winsford Swimming Club |
| 1289581 | Thomas | Sophia | Sophia | 2007 | Female | Norwich Swan SC |
| 19524 | Thomas | Sophie | Sophie | 1990 | Female | Cannock Phoenix Swimming Club |
| 32316 | Thomas | Sophie | Sophie | 1996 | Female | Rhyl Dolphins SC |
| 149859 | Thomas | Sophie | Sophie | 1994 | Female | |
| 186233 | Thomas | Sophie | Sophie | Female | City of Bristol SC | |
| 318867 | Thomas | Sophie | Sophie | 1996 | Female | Cwmbran |
| 359817 | Thomas | Sophie | Sophie | 1994 | Female | Llanelli |
| 9999913087 | Thomas | Sophie | Sophie | Female | ||
| 714682 | Thomas | Sophie | Sophie | 1997 | Female | Fontygary Flippers |
| 808780 | Thomas | Sophie | Sophie | 2002 | Female | Elmbridge Phoenix SC |
| 1104344 | Thomas | Sophie | Sophie | 2004 | Female | Pershore SC |
| 1269657 | Thomas | Sophie | Sophie | 2005 | Female | Rugby SC |
| 1420513 | Thomas | Sophie | Sophie | Female | Bury and Elton SC | |
| 1396557 | Thomas | Sophie | Sophie | Female | Hertford SC | |
| 1404337 | Thomas | Sophie | Sophie | 2005 | Female | Rhondda |
| 1442881 | Thomas | Sophie | Charlie | Open/Male | Leamington Spa SC | |
| 1444351 | Thomas | Sophie | Sophie | 2010 | Female | Devonport RSA |
| 1495919 | Thomas | Sophie | Sophie | 2013 | Female | Nexus Valleys Swimming Club |
| 1693054 | Thomas | Sophie | Sophie | 2014 | Female | Stafford Apex SC |
| 1708866 | Thomas | Sophie | Sophie | Female | Wells Swimming Club | |
| 1324604 | Thomas | Spencer | Spencer | 2011 | Open/Male | Chase SC |
| 324560 | Thomas | Stacey | Stacey | Female | City of Cardiff | |
| 1459887 | Thomas | Stacey | Stacey | 2007 | Female | Rhondda |
| 1654160 | Thomas | Stefan | Stefan | 2005 | Open/Male | Asa Temporary cat 2 club |
| 1204833 | Thomas | Stella | Stella | 2004 | Female | Leander SC |
| 32266 | Thomas | Stephanie | Stephanie | Female | ||
| 39841 | Thomas | Stephen | Stephen | Open/Male | ||
| 7641 | Thomas | Steven | Steven | Open/Male | Wincanton SC | |
| 1474068 | Thomas | Stevie | Stevie | Open/Male | Crystal Palace Diving Club | |
| 1577683 | Thomas | Stirling | Stirling | Open/Male | Beacon SC | |
| 389767 | Thomas | Stuart | Stuart | 1975 | Open/Male | Soundwell SC |
| 31826 | Thomas | Stuart | Stuart | Open/Male | ||
| 819753 | Thomas | Summer | Summer | 2004 | Female | Chesterfield Swimming Club |
| 206473 | Thomas | Susan | Susan | Female | Enfield Swim Squad | |
| 541029 | Thomas | Susan | Susan | 1998 | Female | Penley Swimming Club |
| 879135 | Thomas | Tallulah | Tallulah | Female | Elmbridge Phoenix SC | |
| 1377425 | Thomas | Tallulah | Tallulah | Female | Epping Forest Dist SC | |
| 31586 | Thomas | Tamsin | Tamsin | 1992 | Female | Penyrheol ASC |
| 9999928783 | Thomas | Tamsin | Tamsin | Female | ||
| 418819 | THOMAS | TARA | TARA | 1996 | Female | |
| 1322720 | Thomas | Taran | Taran | 2006 | Open/Male | Anaconda SC |
| 524527 | Thomas | Tarragon | Taz | Open/Male | Bournemouth SC | |
| 1284589 | Thomas | Tate-Jack | Tate-Jack | 2010 | Open/Male | Aberavon Swimming Club |
| 1291881 | Thomas | Taylor | Thomas | Open/Male | Redditch SC | |
| 1755773 | Thomas | Ted | Ted | Open/Male | Wyre Forest SC | |
| 1312138 | Thomas | Teddy | Teddy | Open/Male | Epping Forest Dist SC | |
| 1604339 | Thomas | Tegan | Macey | Female | Leicester Sharks Swimming Club | |
| 1313385 | Thomas | Theo | Theo | 2006 | Open/Male | Alton & District Swimming Club |
| 1393218 | Thomas | Theo | Theo | 2008 | Open/Male | Celtic Dolphins |
| 1385180 | Thomas | Theresa | Theresa | 2006 | Female | City of Hereford SC |
| 1378046 | Thomas | Tia | Tia | Female | Wythenshawe SC | |
| 1490959 | Thomas | Tierra | Tierra | 2010 | Female | Borough of Kirklees SC |
| 1297245 | Thomas | Tiffany | Tiff | 2005 | Female | Richmond Dales ASC |
| 1764163 | Thomas | Tilly | Tilly | Female | Garston SC | |
| 1528102 | Thomas | Tim | Tim | Open/Male | South London Open Water SC | |
| 1158152 | Thomas | Toby | Toby | Open/Male | Marlborough Penguins ASC | |
| 1337275 | Thomas | Toby | Toby | 2007 | Open/Male | Clwb Nofio Bangor Swim Club |
| 1680628 | Thomas | Toby | Toby | 2011 | Open/Male | Felixstowe SC |
| 1412782 | Thomas | Tonje | Tonje | Female | Havering Dolphins | |
| 1221475 | Thomas | Travis | Travis | 2006 | Open/Male | Nexus Valleys Swimming Club |
| 1447136 | Thomas | Travis | Travis | 2010 | Open/Male | Rhondda |
| 1367798 | Thomas | Tristan | Tristan | 2009 | Open/Male | Boldon C.A. Swim Club |
| 97000132 | Thomas | Tristan | Tristan | 2010 | Open/Male | Milford Haven |
| 1508345 | Thomas | Tyla-Jade | Tyla | 2012 | Female | Medway Maritime Swimming Club |
| 906683 | Thomas | Tyler | Tyler | 2002 | Open/Male | Chatteris Kingfishers SC |
| 1339716 | Thomas | Tyra | Tyra | 2006 | Female | Rhondda |
| 775400 | Thomas | Verona | Verona | Female | Watford SC | |
| 26576 | Thomas | Vicki | Vicki | Female | ||
| 5507 | Thomas | Victoria | Victoria | Female | ||
| 93737 | Thomas | Victoria | Victoria | Female | ||
| 458145 | Thomas | Victoria | Victoria | 1987 | Female | Carn Brea and Helston SC |
| 1760656 | Thomas | Violet | Violet | Female | Southport SC | |
| 1657407 | Thomas | Wesley | Wes | 2012 | Open/Male | Soundwell SC |
| 97001143 | Thomas | Wilf | Wilf Thomas | 2012 | Open/Male | Aberystwyth and District Swimmin |
| 97005233 | Thomas | Wiliam | Wiliam | 2013 | Open/Male | City of Cardiff |
| 1305080 | Thomas | Will | Will | Open/Male | Crewe Flyers SC | |
| 323687 | Thomas | William | Will | Open/Male | Thanet Swim Club | |
| 6705 | Thomas | William | William | Open/Male | ||
| 36947 | Thomas | William | William | 1987 | Open/Male | Maidstone SC |
| 9999800748 | Thomas | William | William | Open/Male | ||
| 317085 | Thomas | William | William | 1995 | Open/Male | Northgate Bridgnorth SC |
| 952244 | Thomas | William | William | 2006 | Open/Male | Lydney SC |
| 1180733 | Thomas | William | William | 2007 | Open/Male | Worcester SC |
| 1243876 | Thomas | William | William | Open/Male | Tigers SC (Jersey) Ltd | |
| 1262849 | Thomas | William | Will | 2004 | Open/Male | ASKA (Chester) Swimming Club |
| 1394460 | Thomas | William | William | Open/Male | Blackpool Aquatics ASC | |
| 1457735 | Thomas | William | William | 2010 | Open/Male | Taunton Deane SC |
| 1483203 | Thomas | William | William | 2010 | Open/Male | Beckenham SC |
| 1499213 | Thomas | William | William | Open/Male | Cannock Phoenix Swimming Club | |
| 1507442 | Thomas | William | William | Open/Male | Exeter City Swimming Club | |
| 1702047 | Thomas | William | William | Open/Male | Brighton SC | |
| 1748756 | Thomas | Wilson | Wilson | Open/Male | Braunstone SC | |
| 1709948 | Thomas | Wren | Wren | Female | Leander SC | |
| 1483599 | Thomas | Xavier | Xavier | 2012 | Open/Male | City of Sheffield Diving Club |
| 1233286 | Thomas | Yasmin | Yasmin | 2003 | Female | Cheltenham Phoenix Aquatics Club |
| 1511438 | Thomas | Ysella | Ysella | 2009 | Female | St Ives Bay SC |
| 1303207 | Thomas | Zach | Zach | 2009 | Open/Male | Carnforth & Dist Otters |
| 946327 | Thomas | Zachary | Zachary | 2002 | Open/Male | Milford Haven |
| 1109753 | Thomas | Zachary | Zac | Open/Male | Winchester City Penguins | |
| 1385470 | Thomas | Zachary | Zachary | Open/Male | Leighton Buzzard SC | |
| 1500796 | Thomas | Zachary | Zachary | 2009 | Open/Male | Bridgend County Swim Squad |
| 1748668 | Thomas | Zachary | Zachary | Open/Male | Braunstone SC | |
| 819559 | Thomas | Zahrah | Zahrah | 1999 | Female | Gainsborough Dolphins SC |
| 1385571 | Thomas | Zak | Zak | 2010 | Open/Male | City of Norwich SC |
| 819552 | Thomas | Zaki | Zaki | 1999 | Open/Male | Gainsborough Dolphins SC |
| 1331635 | Thomas | Zara | Zara | Female | Stockton ASC | |
| 51476 | Thomas | Zoe | Zoe | 1993 | Female | Carmarthen |
| 76716 | Thomas | Zoe | Zoe | 1993 | Female | Bridgend Swim Club |
| 323355 | Thomas | Zoe | Zoe | 1995 | Female | |
| 9999915907 | Thomas | Zoe | Zoe | Female | ||
| 9999923255 | Thomas | Zoe | Zoe | Female | ||
| 1183972 | Thomas | Zoe | Zoe | 2004 | Female | Bridgend County Swim Squad |
| 1371159 | Thomas | Zoe | Zoe | Female | Crystal Palace Diving Club | |
| 1379215 | Thomas | Zoe | Zoe | 2007 | Female | Preseli Panthers |
| 1483635 | Thomas | Zoe | Zoe | 2008 | Female | Bramcote Swimming Club |
| 1490558 | Thomas | Zoe | Zoe | Female | Kings Langley SC | |
| 1761132 | Thomas | Zoe | Zoe | Female | Rugby SC | |
| 1383940 | Thomas | Zola | Alexandra | Female | Alton & District Swimming Club | |
| 1738474 | Thomas - Awuah | Reon | Reon | Open/Male | Merton Swordfish SC | |
| 1697049 | Thomas - Morbey | Amelie | Amelie | Female | Ware SC | |
| 1727190 | Thomas - Morbey | Thea | Thea | Female | Ware SC | |
| 1694688 | Thomas Adderson | Daisy | Daisy | Female | Redhill & Reigate SC | |
| 1595934 | Thomas Adderson | Lily | Lily | 2011 | Female | Redhill & Reigate SC |
| 1595937 | Thomas Adderson | Poppy | Poppy | Female | Redhill & Reigate SC | |
| 1164206 | Thomas Epstein | Stella | Stella | 2004 | Female | Hackney Aquatics Club |
| 1603557 | Thomas Gowans | Grace | Grace | Female | Sandwell Aquatics Club | |
| 718676 | Thomas Lacroix | Katie | Katie | 1997 | Female | Dove Valley SC |
| 1511483 | Thomas Machleidt | Benno | Benno | 2010 | Open/Male | Winchester City Penguins |
| 1468107 | Thomas Machleidt | Emily | Emily | 2007 | Female | Winchester City Penguins |
| 1617622 | Thomas Machleidt | Timo | Timo | 2011 | Open/Male | Winchester City Penguins |
| 31631 | Thomas- Breese | Rowena | Rowena | 1960 | Female | Rhyl Dolphins SC |
| 1339809 | Thomas-Anderson | Ellen | Ellen | 2008 | Female | Trafford Artistic Swimming Club |
| 1395265 | Thomas-Armoogum | Yasmin | Yasmin | Female | Enfield Swim Squad | |
| 1385368 | Thomas-Austin | Olivia | Olivia | 2007 | Female | Bishops Stortford SC |
| 1376430 | Thomas-Bassett | Katie | Katie | 2006 | Female | Lichfield SC |
| 1402479 | Thomas-Bater | Ella | Ella | 2009 | Female | City of Swansea Aquatics Club |
| 1719838 | Thomas-Bellman | Cleo | Cleo | Female | Wells Swimming Club | |
| 1679395 | Thomas-Bellman | Lyra | Lyra | Female | Wells Swimming Club | |
| 1298058 | Thomas-Brown | Sophia | Sophia | Female | Harlow Penguin SC | |
| 802928 | Thomas-Buffin | Joshua | Josh | Open/Male | Romsey & Totton SC | |
| 517060 | Thomas-Buffin | Zoe | Zoe | Female | Romsey & Totton SC | |
| 980928 | Thomas-Campbell | Jasmine | Jasmine | 2000 | Female | Newbury Swimming Club |
| 1415789 | Thomas-Clay | Ivy | Ivy | Female | Bishops Stortford SC | |
| 472775 | Thomas-Daye | Leah | Leah | 2001 | Female | Streatham SC |
| 1180979 | Thomas-Daye | Leasha | Leasha | Female | Streatham SC | |
| 1204298 | Thomas-Durrant | Brooke | Brooke | 2006 | Female | York City Baths Club |
| 1244922 | Thomas-Durrant | Jenna | Jenna | 2009 | Female | York City Baths Club |
| 1256849 | Thomas-Edwards | Makai | Makai | Open/Male | Harrow Scout & Guide SC | |
| 1296650 | Thomas-Epstein | Aaron | Aaron | 2007 | Open/Male | Hackney Aquatics Club |
| 483436 | Thomas-Gay | Robert | Rob Thomas | 1997 | Open/Male | Ledbury & Malvern SC |
| 838392 | Thomas-Green | Amelie | Amelie | 2003 | Female | Kent Weald Swim Squad |
| 933023 | Thomas-Green | Cicily | Cicily | 2006 | Female | Kent Weald Swim Squad |
| 1428939 | Thomas-Harrison | Noah | Noah | 2008 | Open/Male | Morpeth SC |
| 1625707 | Thomas-Hassan | Lailaa | Lailaa | 2011 | Female | Aberystwyth and District Swimmin |
| 141896 | Thomas-Howells | Hywelis | Hywelis | 1994 | Female | Swansea University |
| 141887 | Thomas-Howells | Siwan | Siwan | 1997 | Female | City of Swansea Aquatics Club |
| 1705282 | Thomas-Humphreys | Catherine | Catherine | Female | Rykneld SC | |
| 1299572 | Thomas-Hunt | Lexi | Lexi | 2006 | Female | Soundwell SC |
| 1300773 | Thomas-Jenkins | Arielle | Arielle | Female | Hoylake SC | |
| 1300774 | Thomas-Jenkins | Ilona | Ilona | Female | Woodchurch SC | |
| 1516869 | Thomas-Jenkins | Logan | Logan | Open/Male | Exmouth Swimming & Lifesaving So | |
| 1516854 | Thomas-Jenkins | Oscar | Oscar | Open/Male | Exmouth Swimming & Lifesaving So | |
| 1284917 | Thomas-Jones | Aneurin | Nye | Open/Male | Cirencester SC | |
| 1388333 | Thomas-Jones | Dylan | Dylan | Open/Male | Cheadle (Staffs) & District | |
| 1284916 | Thomas-Jones | Idris | Idris | Open/Male | Cirencester SC | |
| 97007114 | Thomas-Jones | Reuben | Reuben | 2014 | Open/Male | Rhondda Cynon Taf Performance Sw |
| 766439 | Thomas-Kelly | Jonah | Jonah | 2002 | Open/Male | Ramsbottom SC |
| 1617778 | Thomas-Li | Sheila | Sheila | 2013 | Female | Atherton and Leigh ASC |
| 1511550 | Thomas-Mackintosh | Andrew | Andrew | 2010 | Open/Male | Aberavon Swimming Club |
| 856536 | Thomas-Mansfield | Evan | Evan | 2001 | Open/Male | West Suffolk Swimming Club |
| 882619 | Thomas-Mansfield | Jake | Jake | 2000 | Open/Male | West Suffolk Swimming Club |
| 1224955 | Thomas-Morgans | Osian | Osian | 2006 | Open/Male | Aberaeron SC |
| 1417379 | Thomas-Negro | Ewan | Ewan | 2010 | Open/Male | Worthing Swimming Club |
| 1358212 | Thomas-Negro | Yolanda | Yolanda | 2008 | Female | Worthing Swimming Club |
| 9999926933 | Thomas-O'Brien | Jamie | Jamie | Open/Male | ||
| 1433319 | Thomas-Osborne | Jayden | Jayden | 2007 | Open/Male | Newham & University of East Lond |
| 1433318 | Thomas-Osborne | Mia | Mia | 2008 | Female | Newham & University of East Lond |
| 1452990 | Thomas-owen | Efa | Efa | 2012 | Female | Clwb Nofio Caernarfon |
| 403834 | Thomas-parr | Joshua | Joshua | 1997 | Open/Male | Heads of the Valleys |
| 1667290 | Thomas-Peace | Max | Max | Open/Male | Gosport Dolphins SC | |
| 1434195 | Thomas-Reece | Lauren | Lauren | Female | Atherton and Leigh ASC | |
| 977727 | Thomas-Reid | Rebecca | Rebecca | 2004 | Female | Blackpool Aquatics ASC |
| 1635287 | Thomas-Rhoden | Louis | Louis | Open/Male | Perry Beeches Triple SSC | |
| 155784 | Thomas-Richards | Andre | Andre | 1993 | Open/Male | Croydon Amphibians SC |
| 1663460 | Thomas-Robinson | Tabitha | Tabitha | 2014 | Female | Maidenhead ASC |
| 1117663 | Thomas-Round | Joseph | Joseph | Open/Male | Worcester SC | |
| 1312181 | Thomas-Sloley | Jemima | Jemima | 2007 | Female | Luton Diving Club |
| 1691330 | Thomas-Smith | Cass | Cass | Open/Male | Broomfield Park SC | |
| 776030 | Thomas-Smith | Deji | Deji | Open/Male | Leander SC | |
| 1497304 | Thomas-Still | Daisy | Daisy | 2014 | Female | Exeter City Swimming Club |
| 1585488 | Thomas-Still | Elliott | Elliott | Open/Male | Exeter City Swimming Club | |
| 97003753 | Thomas-Summers | Awstin | Awstin | 2014 | Open/Male | Caerphilly County Swim Squad |
| 1427281 | Thomas-Thomson | Benedict | Benedict | 2010 | Open/Male | Kingston Royals SC |
| 548612 | Thomas-Toulson | Jack | Jack | Open/Male | Gravesend & Northfleet SC | |
| 885486 | Thomas-White | Nia | Nia | Female | Bristol Penguin Olympic SC | |
| 804072 | Thomas-White | Rhianydd | Rhianydd | 1999 | Female | Bristol Penguin Olympic SC |
| 41302 | Thomas-Wilson | Helena | Helena | Female | ||
| 1499863 | Thomasi-Hyde | Said | Said | Open/Male | Greenwich Royals SC | |
| 1499870 | Thomasi-Hyde | Zahir | Zahir | Open/Male | Greenwich Royals SC | |
| 1194797 | Thomason | Annie | Annie | 2004 | Female | Barrow ASC |
| 1387810 | Thomason | Austin | Austin | Open/Male | Warrington Swimming Club | |
| 68584 | Thomason | Chelsea | Chelsea | Female | Ramsbottom SC | |
| 1486662 | Thomason | Edward | Edward | 2004 | Open/Male | Hitchin SC |
| 1392108 | Thomason | Emilia | Emilia | Female | Haringey Aquatics | |
| 1189281 | Thomason | Ethan | Ethan | 2007 | Open/Male | Dane Valley SC |
| 804641 | Thomason | Evie | Evie | 2004 | Female | Shepway Swimming Club |
| 944206 | Thomason | Ewan | Ewan | 2004 | Open/Male | Dane Valley SC |
| 1152623 | Thomason | James | James | 2004 | Open/Male | Redhill & Reigate SC |
| 22272 | Thomason | Kate | Kate | Female | Ramsbottom SC | |
| 1324208 | Thomason | Laylah | Layla | 2007 | Female | Wellington (Telford) SC |
| 1392110 | Thomason | Olivia | Olivia | Female | Haringey Aquatics | |
| 372720 | Thomason | Paige | Paige | Female | Copeland ASC | |
| 858670 | Thomason | Rebecca | Becky | 1998 | Female | Harrogate District SC |
| 9999924151 | Thomason | Sharron | Sharron | Female | ||
| 1486663 | Thomason | Stanley | Stanley | 2009 | Open/Male | Hitchin SC |
| 766132 | Thomasson | Ashley | Ash | 1996 | Open/Male | Wellingborough SC |
| 1624940 | Thomasson | Brooke | Brooke | 2009 | Female | Newbury Swimming Club |
| 1606337 | Thomasson | Emily | Emily | 2010 | Female | Crewe Flyers SC |
| 1700646 | Thomasson | Isaac | Isaac | 2015 | Open/Male | Newquay Cormorants SC |
| 766131 | Thomasson | Kirsty | Kirsty | 1998 | Female | Wellingborough SC |
| 77707 | Thomasson | Laura | Laura | Female | Radcliffe S&WPC | |
| 24043 | Thomasson | Michael | Michael | 1990 | Open/Male | Radcliffe S&WPC |
| 247910 | Thomasson | Natalie | Natalie | Female | Stalybridge SC | |
| 1135629 | Thomasson | Rory | Rory | Open/Male | North Cornwall Dragons SC | |
| 1673565 | Thomasson | Teddy | Teddy | Open/Male | Stalybridge SC | |
| 1305284 | Thomasson | Zachary | Zachary | Open/Male | Tigers SC (Jersey) Ltd | |
| 1472143 | Thomasson | Zachary | Zachary | Open/Male | Jersey SC |
