EVENT 208 Female 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 3 | Brooklyn Hale | 14 | S9 | Cockermouth | 5:05.90 |
| 2 | 5 | Kiera Prentice | 20 | | Co Manch Aq | 4:31.75 |
| 3 | 7 | Lauren Dennett | 15 | | Io Man | 4:29.20 |
| 4 | 9 | Kate Roberts | 15 | | Co Liverpool | 4:25.68 |
| 5 | 8 | Martha Sumnall | 14 | | Co Liverpool | 4:28.70 |
| 6 | 6 | Jessica Corder | 15 | | Co Salford | 4:29.90 |
| 7 | 4 | Macy Barker | 17 | | Co Liverpool | 4:32.60 |
| 8 | 2 | Fallon Cooney | 22 | S10 | Aquabears | 5:41.28 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 11 | Mollie Fisher | 19 | | Co Manch Aq | 4:23.30 |
| 2 | 15 | Kerry Hennie | 16 | | Co Liverpool | 4:20.00 |
| 3 | 18 | Abbie Roscoe | 15 | | Wirral Metro | 4:15.90 |
| 4 | 20 | Amelie Blocksidge | 15 | | Co Salford | 4:05.69 |
| 5 | 19 | Lucy Parsons | 17 | | Co Liverpool | 4:15.30 |
| 6 | 16 | Katie Lee | 16 | | Co Salford | 4:19.90 |
| 7 | 12 | Payton Chesters | 16 | | Co Liverpool | 4:23.20 |
| 8 | 10 | Joni Dunne | 15 | | Co Liverpool | 4:24.94 |