| Personal Details | |
| Name | Isaac Antwhistle |
| Known As | Isaac |
| Year of Birth | 2012 |
| Eligibility Category | Open/Male |
| Membership Details | |||
| Member Number | 1601422 | ||
| Member Status | Current | ||
| Ranked Club | City of Swansea Aquatics Club | ||
| Country of International Representation | Wales | ||
| Membership Categories |
| SW Competitive |
| Clubs & Organisations | |
| Club | Ranked |
| City of Swansea Aquatics Club | Yes |
| Click For Personal Best | 2024 Short Course | Short Course PB | 2024 Long Course | Long Course PB |
| 50m Freestyle | . | 36.96 | 35.17 | 35.17 |
| 100m Freestyle | 1:20.48 | 1:20.48 | 1:16.24 | 1:16.24 |
| 200m Freestyle | 2:51.18 | 2:51.18 | 2:43.92 | 2:43.92 |
| 400m Freestyle | . | . | . | . |
| 800m Freestyle | . | . | . | . |
| 1500m Freestyle | . | . | . | . |
| 50m Breaststroke | . | 48.14 | 50.86 | 50.86 |
| 100m Breaststroke | 1:45.16 | 1:45.16 | 1:48.03 | 1:48.03 |
| 200m Breaststroke | . | 3:48.91 | 3:32.17 | 3:32.17 |
| 50m Butterfly | . | 45.03 | . | 48.72 |
| 100m Butterfly | . | 1:47.96 | 1:38.07 | 1:38.07 |
| 200m Butterfly | . | . | . | . |
| 50m Backstroke | 44.15 | 41.85 | 40.87 | 40.87 |
| 100m Backstroke | 1:31.09 | 1:31.09 | . | 1:32.40 |
| 200m Backstroke | . | 3:09.70 | 2:57.80 | 2:57.80 |
| 200m Individual Medley | 3:12.48 | 3:12.48 | 3:14.07 | 3:14.07 |
| 400m Individual Medley | . | . | . | . |
| 100m Individual Medley | . | 1:42.28 | . | . |
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