EVENT 301 Female 09 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Ada PAGE | 10 | Grantham | |
| 2 | 2 | Evangeline KINNEAR | 13 | Grantham | 8:24.20 |
| 3 | 3 | Norahh MOE-AUNG | 12 | Grantham | 7:51.12 |
| 4 | 4 | Annabel HILLSON | 11 | Grantham | 7:12.01 |
| 5 | 5 | Yu Tsing (Trixie) CHEU | 13 | Grantham | 7:08.83 |
| 6 | 6 | Francesca WESTON | 11 | Grantham | 7:01.17 |
| 7 | 7 | Esme EVANS | 12 | Grantham | 6:51.19 |
| 8 | 8 | Madeline SURTEES | 14 | Grantham | 6:20.36 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Matilda MCDONNELL | 13 | Grantham | 6:16.81 |
| 2 | 10 | Hollie-Ann CROOK | 12 | Grantham | 6:11.90 |
| 3 | 11 | Honey FLOWER | 12 | Grantham | 5:57.25 |
| 4 | 12 | Ella KHAMA | 12 | Grantham | 5:51.98 |
| 5 | 13 | Elisabeth KINNEAR | 16 | Grantham | 5:33.49 |
| 6 | 14 | Isabelle CLAYTON | 14 | Grantham | 5:28.63 |
| 7 | 15 | Lexie SHEWAN | 16 | Grantham | 5:23.11 |
| 8 | 16 | Ruby TALKES | 10 | Grantham | 5:20.52 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Ellena HOWITT | 15 | Grantham | 5:02.07 |
| 2 | 20 | Elena ALDENHOFF-KELLY | 18 | Grantham | 4:47.83 |
| 3 | 22 | Lucy WILLATTS | 15 | Grantham | 4:38.50 |
| 4 | 24 | Emily TALKES | 14 | Grantham | 4:35.96 |
| 5 | 23 | Chloe HOPKINSON | 21 | Grantham | 4:37.62 |
| 6 | 21 | Isla GRAY | 16 | Grantham | 4:45.76 |
| 7 | 19 | Lizzy LERESCHE HANDS | 15 | Grantham | 5:00.65 |
| 8 | 17 | Amy TAYLOR | 15 | Grantham | 5:05.36 |