EVENT 401 Girls 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Evie DAVIES | 10 | Deepings | 8:00.00 |
| 3 | 3 | Lexie BARBER | 11 | Rotherham Mo | 7:42.08 |
| 4 | 2 | Annabel SHEPHERD | 11 | Deepings | 7:43.60 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Lucy JENKINSON | 11 | Deepings | 7:32.20 |
| 2 | 7 | Charlotte JENKINSON | 13 | Deepings | 6:49.15 |
| 3 | 9 | Tate FOX | 12 | Bassetlaw SS | 6:17.30 |
| 4 | 8 | Charlotte DENON | 13 | Eckington | 6:40.00 |
| 5 | 6 | Carly SILKSTONE | 13 | Rotherham Mo | 7:31.20 |
| 6 | 4 | Mobisade ADEWUMI | 9 | Rotherham Mo | 7:35.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Stansie CROWE | 12 | Bassetlaw SS | 6:07.40 |
| 2 | 13 | Olivia HEAFIELD | 12 | Rotherham Mo | 6:05.00 |
| 3 | 15 | Lily BARRETT | 16 | Rotherham Mo | 5:52.33 |
| 4 | 14 | Abigail BETTS | 13 | Bassetlaw SS | 5:59.63 |
| 5 | 12 | Megan JACKSON-OATES | 13 | Nova Cent'n | 6:07.29 |
| 6 | 10 | Neve LYNCH | 14 | Rotherham Mo | 6:11.04 |