| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Abbie MACKIE | 12 | March | 4:15.00 |
| 3 | 3 | Lauren BAILEY | 13 | St Ives | 4:14.17 |
| 4 | 2 | Devon O'NEIL | 11 | March | 4:15.00 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Millie WALKER | 13 | March | 3:14.19 |
| 2 | 7 | Hannah STOREY | 15 | March | 3:09.84 |
| 3 | 9 | Sian WOODS | 16 | St Ives | 2:53.70 |
| 4 | 8 | Tilda CLEMENTS | 13 | St Neot Swan | 3:04.43 |
| 5 | 6 | Grace IDDON | 14 | St Ives | 3:14.10 |
| 6 | 4 | Grace WEBB | 14 | March | 3:50.38 |