EVENT 103 Girls 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Ella Bele KHAMA | 9 | Grantham | |
| 4 | 2 | Ava-Grace GREGORY | 11 | Grantham | |
| 5 | 3 | Eden DYSON | 12 | Grantham | |
| 6 | 4 | Hollie-Ann CROOK | 9 | Grantham | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Sophie PERKINS | 12 | Grantham | |
| 2 | 6 | E LERESCHE HANDS | 12 | Grantham | |
| 3 | 7 | Sascha NEL | 13 | Grantham | |
| 4 | 8 | Octavia SHEARN | 11 | Grantham | |
| 5 | 9 | Elisabeth KINNEAR | 13 | Grantham | |
| 6 | 10 | Helena HAMILTON | 12 | Grantham | 2:20.86 |
| 7 | 11 | Poppy HATHWAY | 12 | Grantham | 2:00.40 |
| 8 | 13 | Marcelina DEBICKA | 15 | Grantham | 1:38.20 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 14 | Isobel ALLSOP | 13 | Grantham | 1:36.00 |
| 2 | 15 | Annie WEBSTER | 11 | Grantham | 1:34.16 |
| 3 | 16 | Amy TAYLOR | 12 | Grantham | 1:31.20 |
| 4 | 17 | Jessica - Rose DAVISON | 14 | Grantham | 1:30.70 |
| 5 | 18 | Darcey WOOD | 12 | Grantham | 1:29.56 |
| 6 | 19 | Charlotte GILL | 15 | Grantham | 1:28.83 |
| 7 | 20 | Lucy WILLATTS | 12 | Grantham | 1:26.58 |
| 8 | 21 | Jemma MUNRO | 15 | Grantham | 1:25.69 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Sophie WARD | 14 | Grantham | 1:20.08 |
| 2 | 25 | Ellena HOWITT | 12 | Grantham | 1:16.95 |
| 3 | 27 | Megan BROWN | 14 | Grantham | 1:10.74 |
| 4 | 29 | Grace TURNER | 16 | Grantham | 1:07.26 |
| 5 | 28 | Evie TURNER | 17 | Grantham | 1:08.65 |
| 6 | 26 | Harriet MCCORMACK | 14 | Grantham | 1:15.22 |
| 7 | 24 | Emilie WEBB | 13 | Grantham | 1:18.12 |
| 8 | 22 | Grace HOWITT | 14 | Grantham | 1:21.16 |