EVENT 308 Women Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 3 | Charlotte Mullarkey | 16 | Co Salford | 5:15.72 |
| 4 | 5 | Isobel Hitchmough | 13 | Warrington W | 5:21.49 |
| 5 | 4 | Charlotte Grimshaw | 17 | Workington | 5:22.78 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | Kerry Hennie | 14 | Warrington W | 5:18.25 |
| 2 | 9 | Olivia Lloyd-Jones | 17 | Co Manch Aq | 5:08.64 |
| 3 | 11 | Amber Rigg | 14 | Cockermouth | 5:11.16 |
| 4 | 13 | Evie Clare | 13 | Stockport Mo | 5:06.41 |
| 5 | 12 | Olivia O'Mahony | 14 | Cockermouth | 5:25.29 |
| 6 | 10 | Lily Horton | 14 | Wirral Metro | 5:22.75 |
| 7 | 8 | Jasmine Bouaziz | 13 | Warrington W | 5:18.91 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Eve Horton | 16 | Wigan BEST | 5:09.98 |
| 2 | 18 | Martha Ricketts | 15 | Satellite | 5:11.99 |
| 3 | 20 | Ellie Wilson | 15 | Cockermouth | 5:11.61 |
| 4 | 22 | Sophie Weston | 16 | Warrington W | 5:13.41 |
| 5 | 21 | Evie Cutter | 13 | Wigan BEST | 5:17.22 |
| 6 | 19 | Amy Kenworthy | 16 | Winsford | 5:07.01 |
| 7 | 17 | Lauren Jones | 17 | Warrington W | 5:11.85 |
| 8 | 14 | Gia Hothersall | 16 | Wirral Metro | 5:11.19 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Eliza Pinkstone | 17 | Stockport Mo | 5:15.04 |
| 2 | 26 | Sophie Traill | 15 | Stockport Mo | 5:01.68 |
| 3 | 28 | Abbie Roscoe | 13 | Wirral Metro | 5:02.17 |
| 4 | 30 | Rachel Hornby | 18 | Wigan BEST | 5:01.06 |
| 5 | 29 | Amelie Blocksidge | 13 | Co Salford | 4:58.71 |
| 6 | 27 | Katie Lee | 14 | Co Salford | 5:02.97 |
| 7 | 25 | Olivia Sheehan | 17 | Wigan BEST | 5:09.21 |
| 8 | 23 | Ella Blocksidge | 16 | Co Salford | 5:16.71 |