EVENT 102 Girls 09 Yrs/Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Isla-Rose WILDISH | 9 | Retford | |
| 2 | 2 | Yasmine WAITE | 13 | March | |
| 3 | 3 | Seren STAPLEY-RANDALL | 11 | March | |
| 4 | 4 | Isabelle CLAYTON | 10 | Grantham | 2:23.86 |
| 5 | 5 | Sophie GILL | 11 | Grantham | 2:23.86 |
| 6 | 6 | Elisabeth KINNEAR | 13 | Grantham | 2:05.00 |
| 7 | 7 | Abbie MACKIE | 13 | March | 1:55.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Amelie MORRIS | 11 | Boston | 1:51.44 |
| 2 | 9 | Cobra THORLBY | 13 | Boston | 1:50.19 |
| 3 | 10 | Niamh O'DONOGHUE | 11 | March | 1:46.97 |
| 4 | 11 | Annie WEBSTER | 11 | Grantham | 1:45.02 |
| 5 | 12 | Darcey WOOD | 11 | Grantham | 1:45.02 |
| 6 | 13 | Jessica HALL | 11 | Grantham | 1:45.02 |
| 7 | 14 | Mia PARAPIJONAVICIUTE | 14 | Grantham | 1:45.00 |
| 8 | 15 | Shelby THORLBY | 17 | Boston | 1:42.04 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Marcelina DEBICKA | 15 | Grantham | 1:38.77 |
| 2 | 17 | Vilte ROPEIKAITE | 14 | Boston | 1:35.74 |
| 3 | 18 | Amelie VENABLES | 11 | Retford | 1:34.63 |
| 4 | 19 | Lucy WILLATTS | 11 | Grantham | 1:34.12 |
| 5 | 20 | Isla STATON | 12 | March | 1:32.58 |
| 6 | 21 | Amy TAYLOR | 12 | Grantham | 1:31.20 |
| 7 | 22 | Charlotte GILL | 14 | Grantham | 1:28.83 |
| 8 | 23 | Isla GRAY | 13 | Grantham | 1:28.01 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Sophie WARD | 13 | Grantham | 1:26.36 |
| 2 | 25 | Isobel MANNING | 14 | Boston | 1:26.02 |
| 3 | 26 | Lillie HARRIS | 15 | Sherwood | 1:25.77 |
| 4 | 27 | Ellena HOWITT | 12 | Grantham | 1:25.37 |
| 5 | 28 | Libby BUNN | 15 | Boston | 1:24.90 |
| 6 | 29 | Grace HOWITT | 14 | Grantham | 1:24.33 |
| 7 | 30 | Emilija IVANOVA | 14 | Boston | 1:23.01 |
| 8 | 31 | Harriet MCCORMACK | 13 | Grantham | 1:21.22 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Evie COBURN | 14 | Melton M'bry | 1:17.37 |
| 2 | 36 | Tiegan GRAY | 16 | Gainsborough | 1:10.91 |
| 3 | 39 | Evie TURNER | 17 | Grantham | 1:08.65 |
| 4 | 41 | Grace TURNER | 15 | Grantham | 1:07.26 |
| 5 | 40 | Chloe HOPKINSON | 18 | Grantham | 1:08.04 |
| 6 | 37 | Corey FARLEY | 14 | Grantham | 1:10.47 |
| 7 | 35 | Holly GRIFFIN | 16 | Grantham | 1:13.37 |
| 8 | 33 | Emilie WEBB | 13 | Grantham | 1:18.12 |