EVENT 604 Women 13/15 Yrs 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 2 | Eva Gallagher | 14 | Corby | 6:42.20 |
| 4 | 4 | Isla Robertson | 13 | Northampton | 6:27.19 |
| 5 | 3 | Faye Eyton-Jones | 14 | Corby | 6:38.80 |
| 6 | 1 | Emily Fern | 13 | Northampton | 7:12.56 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Maddie Walden | 13 | Northampton | 6:23.29 |
| 2 | 8 | Chloe Tangayi | 15 | Northampton | 6:13.80 |
| 3 | 10 | Aaliyah Beetson | 14 | Wellingboro | 6:10.65 |
| 4 | 12 | Emily Denton | 14 | Northampton | 6:10.13 |
| 5 | 11 | Amy McVey | 15 | Northampton | 6:10.17 |
| 6 | 9 | Mia Allan | 13 | Northampton | 6:11.59 |
| 7 | 7 | Elizabeth Pow | 14 | Rushden | 6:17.30 |
| 8 | 5 | Maya Bovingdon | 14 | Northampton | 6:27.10 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 14 | Orna Lett | 13 | Daventry | 6:03.55 |
| 2 | 16 | Nya Wilkinson | 14 | Northampton | 5:57.70 |
| 3 | 18 | Beau Cunningham | 14 | Corby | 5:43.80 |
| 4 | 20 | Chiara Reedha | 14 | Corby | 5:35.98 |
| 5 | 19 | Phebe Adams | 14 | Northampton | 5:43.19 |
| 6 | 17 | Grace Grindrod | 15 | Northampton | 5:53.22 |
| 7 | 15 | Taryn Payne | 14 | Northampton | 5:59.06 |
| 8 | 13 | Holly Hayle | 14 | Northampton | 6:07.33 |