EVENT 301 Girls 10 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Lucy BEARDSMORE | 12 | Grantham | |
| 3 | 2 | Lexie SHEWAN | 12 | Grantham | |
| 4 | 3 | Ellena HOWITT | 11 | Grantham | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Poppy HATHWAY | 11 | Grantham | |
| 2 | 5 | Amy TAYLOR | 11 | Grantham | |
| 3 | 6 | Annie WEBSTER | 10 | Grantham | |
| 4 | 7 | Lucy WILLATTS | 11 | Grantham | |
| 5 | 8 | Olivia FARNSWORTH | 12 | Grantham | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Isabella STARK | 12 | Grantham | 7:58.71 |
| 2 | 11 | Grace HOWITT | 13 | Grantham | 6:23.20 |
| 3 | 12 | Amelia HATHWAY | 13 | Grantham | 6:08.08 |
| 4 | 13 | Harriet MCCORMACK | 13 | Grantham | 6:03.90 |
| 5 | 14 | Sophie WARD | 13 | Grantham | 6:02.25 |
| 6 | 15 | Jessica-Rose DAVISON | 13 | Grantham | 5:55.27 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Alexa WRIGHT | 14 | Grantham | 5:52.43 |
| 2 | 17 | Marcelina DEBICKA | 14 | Grantham | 5:52.40 |
| 3 | 18 | Rianna ABBOTT | 14 | Grantham | 5:34.47 |
| 4 | 19 | Cora FARLEY | 13 | Grantham | 5:30.12 |
| 5 | 20 | Megan BROWN | 13 | Grantham | 5:26.57 |
| 6 | 21 | Elena ALDENHOFF-KELLY | 14 | Grantham | 5:17.79 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Alexandra HALLAM-STOTT | 16 | Grantham | 4:57.24 |
| 2 | 25 | Francesca HALLAM-STOTT | 15 | Grantham | 4:41.71 |
| 3 | 27 | Chloe HOPKINSON | 17 | Grantham | 4:37.43 |
| 4 | 26 | Grace TURNER | 15 | Grantham | 4:39.66 |
| 5 | 24 | Evie TURNER | 16 | Grantham | 4:46.94 |
| 6 | 22 | Grace MACDONALD | 13 | Grantham | 5:01.90 |