EVENT 404 Women 15 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Amelie Monger | 15 | Nova Cent'n | 5:59.54 |
| 4 | 3 | Daniela Bringeman | 16 | South Lincs | 5:46.19 |
| 5 | 2 | Gracie-May Cole | 15 | Co Lincoln P | 5:50.44 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 5 | Abbie Tunnicliffe | 15 | Derby Excel | 5:40.70 |
| 1 | 7 | Matilda Hase | 16 | Derby Excel | 5:37.05 |
| 2 | 9 | Mia Matthews | 16 | Northampton | 5:31.37 |
| 3 | 11 | Yanet Fung | 15 | Nova Cent'n | 5:32.16 |
| 4 | 13 | Evelyn Jackson | 15 | Bassetlaw SS | 5:41.16 |
| 5 | 12 | Kate Pearson | 17 | Chesterfield | 5:32.46 |
| 6 | 10 | Millie King | 15 | Derby Excel | DN:C . |
| 7 | 8 | Alexandra Hallam-Stott | 17 | Grantham | 5:53.69 |
| 8 | 6 | Lillie Hamilton | 15 | South Lincs | 5:41.12 |
| 9 | 4 | Orla Eyton-Jones | 17 | Corby | 5:37.41 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 17 | Poppy Scotchbrook | 16 | Co Leicester | DN:C . |
| 1 | 23 | Francesca Hallam-Stott | 16 | Grantham | 5:29.42 |
| 2 | 29 | Lilly Tappern | 16 | Corby | 5:20.68 |
| 3 | 35 | Abby Mitchell | 17 | Co Leicester | 5:13.13 |
| 4 | 41 | Eleanor Broughton | 17 | Repton | 5:04.40 |
| 5 | 38 | Henrietta D’Ammassa | 18 | Repton | 5:07.50 |
| 6 | 32 | Millie Wells | 16 | Co Leicester | 5:18.85 |
| 7 | 26 | Grace Turner | 16 | Grantham | 5:24.93 |
| 8 | 20 | Olivia Beard | 15 | Nova Cent'n | 5:31.72 |
| 9 | 14 | Elizabeth Palfrey | 15 | Loughborough | 5:41.23 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 18 | Emily Parkins | 16 | Nova Cent'n | 5:33.45 |
| 1 | 24 | Ermita Balnyte | 15 | Nova Cent'n | 5:27.13 |
| 2 | 30 | Beatrice Finch | 17 | South Lincs | 5:20.90 |
| 3 | 36 | Darcie Platts | 15 | Co Leicester | 5:15.92 |
| 4 | 42 | Holly Robinson | 18 | Repton | DN:C . |
| 5 | 39 | Livia Kingsland | 18 | Nova Cent'n | 5:09.10 |
| 6 | 33 | Alice Streeter | 17 | Co Leicester | 5:20.83 |
| 7 | 27 | Chloe Daybell | 18 | Nova Cent'n | 5:21.63 |
| 8 | 21 | Shae Stewart | 17 | Nova Cent'n | 5:28.69 |
| 9 | 15 | Kt Taylor | 17 | Chesterfield | 5:32.62 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 19 | Sophie Martin | 16 | Chesterfield | 5:39.01 |
| 1 | 25 | Philippa Hickman | 15 | Nova Cent'n | 5:20.83 |
| 2 | 31 | Lily Freeman | 16 | Northampton | 5:20.74 |
| 3 | 37 | Olivia Hunter | 19 | Co Leicester | 5:10.76 |
| 4 | 43 | Kate Morris | 18 | Nova Cent'n | 5:11.50 |
| 5 | 40 | Holly Marshall | 17 | Repton | 5:00.86 |
| 6 | 34 | Lily Jackson-Oates | 18 | Nova Cent'n | 5:13.74 |
| 7 | 28 | Chloe Hopkinson | 18 | Grantham | 5:24.95 |
| 8 | 22 | Jessica Cater | 16 | Nova Cent'n | 5:24.90 |
| 9 | 16 | Freya Jones | 15 | Nova Cent'n | 5:24.65 |