| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Kitty DYSON | 9 | Southport | |
| 3 | 3 | Melina CHRYSSOVERGIS | 12 | Southport | 1:40.53 |
| 4 | 2 | Bryony JONES | 10 | Southport | 1:41.83 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Niamh CORRIGAN | 11 | Southport | 1:27.38 |
| 2 | 7 | Pippa VEGH | 14 | Southport | 1:11.30 |
| 3 | 9 | Evie SAMPSON | 13 | Southport | 1:06.10 |
| 4 | 8 | Faith FELLOWS | 15 | Southport | 1:09.50 |
| 5 | 6 | Hannah GRUNDY | 16 | Southport | 1:23.52 |
| 6 | 4 | Teresa-Lynn PALLAS | 14 | Southport | 1:33.18 |