EVENT 503 Women's MC 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Cat | Club | Time |
| 3 | 1 | Alice Tai | 99 | S8 | Ealing | 1:21.66 |
| 4 | 2 | Meghan Willis | 07 | S9 | Torfaen D | 1:16.60 |
| 5 | 3 | Brock Whiston | 96 | S8 | Bark & Dagen | 1:14.31 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Cat | Club | Time |
| 1 | 4 | Grace Robinson | 07 | S14 | Co Manch Aq | 1:11.73 |
| 2 | 5 | Jessica-Jane Applegate | 96 | S14 | Co Norwich | 1:10.96 |
| 3 | 6 | Georgia Sheffield | 05 | S14 | Bolton Metro | 1:08.75 |
| 4 | 7 | Callie-Ann Warrington | 00 | S10 | RTW Monson | 1:08.67 |
| 5 | 8 | Louise Fiddes | 01 | S14 | Hatfield | 1:05.90 |
| 6 | 9 | Faye Rogers | 02 | S10 | UoAPS | 1:05.48 |
| 7 | 10 | Poppy Maskill | 05 | S14 | Alsager | 1:05.04 |
| 8 | 11 | Olivia Newman-Baronius | 06 | S14 | Maxwell | 1:04.20 |