EVENT 309 Women Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Tate FOX | 11 | Bassetlaw Swim Squad | 1:43.97 |
| 3 | 2 | Stansie CROWE | 11 | Bassetlaw Swim Squad | 1:39.21 |
| 4 | 3 | Alex TIGGARDINE | 13 | Borough of Barnsley SC | 1:39.10 |
| 5 | 4 | Iona WATSON | 13 | Bassetlaw Swim Squad | 1:38.87 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Starla HOPE | 11 | Bassetlaw Swim Squad | 1:37.50 |
| 2 | 6 | Poppy GOODACRE | 11 | Bassetlaw Swim Squad | 1:36.20 |
| 3 | 7 | Aimee ALY-WESTON | 12 | Bassetlaw Swim Squad | 1:34.95 |
| 4 | 8 | Imogen HOWITT | 10 | Bassetlaw Swim Squad | 1:33.61 |
| 5 | 9 | Amelie VENABLES | 10 | Bassetlaw Swim Squad | 1:33.00 |
| 6 | 10 | Abigail BETTS | 12 | Bassetlaw Swim Squad | 1:24.10 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Esme HAYS | 14 | Borough of Barnsley SC | 1:20.37 |
| 2 | 14 | Ruby CREDLAND | 15 | Bassetlaw Swim Squad | 1:17.00 |
| 3 | 16 | Libby GARNHAM | 16 | Newcastle (Staffs) ASC | 1:09.46 |
| 4 | 15 | Emily WINTLE | 12 | Newcastle (Staffs) ASC | 1:14.75 |
| 5 | 13 | Purdy ROBERTS | 14 | Borough of Barnsley SC | 1:20.18 |
| 6 | 11 | Isla O'CONNOR | 11 | Bassetlaw Swim Squad | 1:22.01 |