| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Lucy Dando | 17 | Corby | 6:05.40 |
| 4 | 3 | Grace Wingham | 16 | Kettering | 5:33.69 |
| 5 | 2 | Orla Eyton-Jones | 17 | Corby | 5:37.46 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Isabel Sharp | 17 | Northampton | 5:33.40 |
| 2 | 6 | Mia Matthews | 16 | Northampton | 5:29.10 |
| 3 | 8 | Lilly Tappern | 16 | Corby | 5:07.15 |
| 4 | 10 | Evie Woolley | 17 | Northampton | 5:00.10 |
| 5 | 9 | Lily Freeman | 16 | Northampton | 5:05.83 |
| 6 | 7 | Emilia Cieszczyk | 16 | Northampton | 5:14.82 |
| 7 | 5 | Kalinika Cwiklinska | 16 | Northampton | 5:31.47 |