EVENT 404 Girl Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Mia WALLACE | 10 | Eckington | 2:00.00 |
| 3 | 4 | Chloe DINMORE | 12 | Gainsborough | 1:50.12 |
| 4 | 3 | Erin ARCHER | 11 | Co Lincoln P | 1:51.84 |
| 5 | 1 | Lottie Ava FLATTERS | 10 | Deepings | 2:18.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Charlotte JENKINSON | 12 | Deepings | 1:40.01 |
| 2 | 8 | Amelie VENABLES | 11 | Bassetlaw SS | 1:37.47 |
| 3 | 10 | Isobelle RAFFERTY | 11 | Bassetlaw SS | 1:29.72 |
| 4 | 9 | Isla STOCKLEY | 10 | Bassetlaw SS | 1:34.00 |
| 5 | 7 | Poppy GOODACRE | 12 | Bassetlaw SS | 1:38.56 |
| 6 | 5 | Isobel VAUSE | 14 | Deepings | 1:44.69 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Stansie CROWE | 11 | Bassetlaw SS | 1:26.82 |
| 2 | 14 | Mieke MCDONALD | 12 | Deepings | 1:24.78 |
| 3 | 16 | Scarlett SAMPSON | 13 | Eckington | 1:24.28 |
| 4 | 15 | Iona WATSON | 13 | Bassetlaw SS | 1:24.55 |
| 5 | 13 | Emma ARTHUR | 14 | Co Lincoln P | 1:26.61 |
| 6 | 11 | Lauren MCMANUS | 14 | Eckington | 1:29.71 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Penelope BAXTER | 16 | Deepings | 1:20.23 |
| 2 | 20 | Emmy STINTON | 12 | Co Lincoln P | 1:18.85 |
| 3 | 22 | Kessie WEBSTER | 12 | Derventio | 1:13.25 |
| 4 | 21 | Matilda HASE | 15 | Derventio | 1:15.42 |
| 5 | 19 | Isla O'CONNOR | 12 | Bassetlaw SS | 1:19.58 |
| 6 | 17 | Imogen HOWITT | 10 | Bassetlaw SS | 1:23.09 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Olivia MARSHALL | 14 | Derventio | 1:10.80 |
| 2 | 26 | Lilli-Rose CARR | 13 | Co Lincoln P | 1:09.06 |
| 3 | 28 | Katie HEALD | 16 | Derventio | 1:05.00 |
| 4 | 27 | Freya PEACE | 15 | Bassetlaw SS | 1:06.79 |
| 5 | 25 | Jennifer WALKER | 14 | Bassetlaw SS | 1:09.76 |
| 6 | 23 | Tiegan GRAY | 15 | Gainsborough | 1:10.91 |