EVENT 105 Women Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Ermita Balnyte | 14 | Nova Cent'n | 5:21.83 |
| 3 | 4 | Francesca Hallam-Stott | 15 | Grantham | 5:20.10 |
| 4 | 6 | Olivia Anstey | 14 | Louth | 5:19.06 |
| 5 | 5 | Emily Parkins | 15 | Nova Cent'n | 5:19.85 |
| 6 | 3 | Jasmine Vaartjes | 13 | Repton | 5:20.19 |
| 7 | 1 | Olivia Beard | 14 | Nova Cent'n | 5:21.90 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Sophie Martin | 15 | Chesterfield | 5:16.36 |
| 2 | 10 | Chloe Hopkinson | 17 | Grantham | 5:12.08 |
| 3 | 12 | Alice Streeter | 16 | Co Leicester | 5:10.05 |
| 4 | 14 | Naomi McGuire | 17 | Co Leicester | 5:09.10 |
| 5 | 13 | Lily Freeman | 15 | Northampton | 5:09.56 |
| 6 | 11 | Grace Turner | 15 | Grantham | 5:11.60 |
| 7 | 9 | Lilly Tappern | 15 | Corby | 5:14.16 |
| 8 | 7 | Philippa Hickman | 14 | Nova Cent'n | 5:18.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Darcie Platts | 14 | Co Leicester | 5:08.40 |
| 2 | 18 | Poppy Mathias | 16 | Repton | 5:06.35 |
| 3 | 20 | Abby Mitchell | 16 | Co Leicester | 5:06.00 |
| 4 | 22 | Olivia Hunter | 18 | Co Leicester | 5:05.30 |
| 5 | 21 | Millie Wells | 15 | Co Leicester | 5:05.60 |
| 6 | 19 | Henrietta D'Ammassa | 17 | Repton | 5:06.13 |
| 7 | 17 | Lydia Cordle | 12 | Repton | 5:07.90 |
| 8 | 15 | Emily Farr | 18 | Co Leicester | 5:08.60 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Evie Johnson | 15 | Nova Cent'n | 5:00.50 |
| 2 | 26 | Anna Farrow | 17 | Co Leicester | 4:57.83 |
| 3 | 28 | Kate Morris | 17 | Nova Cent'n | 4:52.95 |
| 4 | 30 | Emma Erskine | 18 | Nova Cent'n | 4:47.33 |
| 5 | 29 | Livia Kingsland | 17 | Nova Cent'n | 4:52.28 |
| 6 | 27 | Eleanor Broughton | 16 | Repton | 4:55.75 |
| 7 | 25 | Holly Robinson | 17 | Repton | 4:59.75 |
| 8 | 23 | Megan Speirs | 18 | Lincoln Vulc | 5:02.34 |