| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Evie Sampson | 9 | Southport | 3:47.28 |
| 4 | 3 | Lucie Winter | 11 | Preston | 3:43.74 |
| 5 | 2 | Honor Luckhurst | 10 | Preston | 3:46.85 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Rumaysa Ali | 10 | Clitheroe | 3:19.90 |
| 2 | 7 | Pippa Vegh | 10 | Southport | 3:08.67 |
| 3 | 9 | Mia Wroe | 12 | Burnley BOBC | 2:48.97 |
| 4 | 11 | Baylie Seery | 16 | Burnley BOBC | 2:43.40 |
| 5 | 10 | Amelia Moss | 13 | Pioneer 79 | 2:45.25 |
| 6 | 8 | Emily West | 12 | Ramsbottom | 3:00.00 |
| 7 | 6 | Amelia Redfearn | 11 | Skipton | 3:09.91 |
| 8 | 4 | Sophie Lea | 10 | Southport | 3:40.20 |