| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | FRANKIE BARTUP | 13 | Cheshunt | |
| 3 | 4 | Gracie TREADAWAY | 11 | Cheshunt | |
| 4 | 3 | ANA ACCELEANU | 10 | Cheshunt | |
| 5 | 1 | Tara BOLAT | 16 | Cheshunt | |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | BETSY BUTCHER | 11 | Cheshunt | 3:46.41 |
| 2 | 8 | Georgiana ACCELEANU | 15 | Cheshunt | 3:42.97 |
| 3 | 10 | Molly BARTUP | 16 | Cheshunt | 2:50.86 |
| 4 | 9 | Mia NELSON | 13 | Cheshunt | 2:58.68 |
| 5 | 7 | Olivia CROFT | 13 | Cheshunt | 3:44.57 |
| 6 | 5 | Rose NASH | 14 | Cheshunt | 3:51.75 |