Open/Male - Long Course - 50m Butterfly - Camden Swiss Cottage SC - 09 Years Age Group - At 31st December 2019
| Rank | Name | Ranked Club | YoB | Meet Name | Venue | Level | Date | Time | FINA |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Martin Vermaat | Camden Swiss | 10 | Derby Excel New Year Meet 2024 | Sheffield | 1 | 21/01/24 | 28.79 | 462 |
| 2 | Jack Redford | Camden Swiss | 10 | SE London Region Summer Championships 2024 | London | 1 | 28/04/24 | 29.97 | 410 |
| 3 | Philip Borisov | Camden Swiss | 10 | Newham & UEL SC National Qualifier Open Meet 2024 | Stratford | 1 | 23/03/24 | 32.20 | 330 |
| 4 | Henry Gillam | Camden Swiss | 10 | Portsmouth Northsea End of Season 2023 LC L3 Meet | Mountbatten Centre | 3 | 15/07/23 | 32.35 | 326 |
| 5 | Harry Hobbs | Camden Swiss | 10 | 2024 Wycombe L3 Long Course Sprint Meet | High Wycombe | 3 | 27/04/24 | 39.70 | 176 |