EVENT 101 Female 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 3 | Natalie Koleva | 14 | Warrington W | 5:20.41 |
| 3 | 5 | Chloe Hopkinson | 20 | Co Manch Aq | 5:19.72 |
| 4 | 8 | Macy Barker | 18 | Co Liverpool | 5:16.30 |
| 5 | 7 | Sophie Grindley | 20 | Winsford | 5:17.21 |
| 6 | 4 | Emily Rowe | 14 | Co Salford | 5:20.20 |
| 7 | 1 | Leah Rose | 17 | Carlisle Aq | 5:21.38 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Mia Robinson | 14 | Southport | 5:12.60 |
| 2 | 12 | Allanah Donlan | 14 | Warrington W | 5:11.90 |
| 3 | 15 | Autum Claxton | 14 | Stockport Mo | 5:09.01 |
| 4 | 17 | Ruby Sheehan | 18 | Wigan BEST | 5:06.58 |
| 5 | 16 | Chloe Jones | 13 | Warrington W | 5:07.20 |
| 6 | 13 | Olivia Knox | 14 | Wigan BEST | 5:10.50 |
| 7 | 11 | Gabriella Giblin | 16 | Stockport Mo | 5:12.58 |
| 8 | 9 | Sophia Hewlett | 15 | Bebington | 5:14.55 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Letian Wu | 16 | Trafford Met | 5:05.37 |
| 2 | 21 | Eve Horton | 19 | Wigan BEST | 5:00.66 |
| 3 | 23 | Evie Cutter | 16 | Wigan BEST | 4:56.97 |
| 4 | 25 | Katie Lee | 17 | Co Salford | 4:41.92 |
| 5 | 24 | Petra Varga | 17 | Wirral Metro | 4:43.88 |
| 6 | 22 | Kerry Hennie | 17 | Co Liverpool | 4:58.20 |
| 7 | 20 | Emily Tabern | 15 | Warrington W | 5:02.90 |
| 8 | 18 | Maisy Smith | 20 | Stockport Mo | 5:05.52 |