| Fastest Heat - 6 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 40 | Letian Wu | 17 | Trafford Met | 17:58.80 |
| 2 | 42 | Harper Aspinall | 14 | Wirral Metro | 17:56.20 |
| 3 | 45 | Ava Halliwell | 15 | Wirral Metro | 17:44.40 |
| 4 | 48 | Abbie Roscoe | 17 | Wirral Metro | 16:36.81 |
| 5 | 46 | Macy Barker | 19 | Co Liverpool | 17:41.70 |
| 6 | 44 | Keira Johnson | 16 | Wigan BEST | 17:48.60 |
| 7 | 41 | Kiera Prentice | 22 | Co Manch Aq | 17:56.30 |
| 8 | 39 | Sophia Hewlett | 16 | Bebington | 17:59.90 |