| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Rose NASH | 14 | Cheshunt | |
| 3 | 3 | Polly MUNSON | 17 | Cheshunt | |
| 4 | 2 | Alexandra PAPCIAK-WRON | 16 | Cheshunt | |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Maya ROBU | 14 | Cheshunt | 3:10.32 |
| 2 | 6 | Phoebe WEIGHT | 14 | Cheshunt | 3:06.20 |
| 3 | 8 | Mia NELSON | 13 | Cheshunt | 2:53.20 |
| 4 | 7 | Isabel MULLINGS | 16 | Cheshunt | 2:58.32 |
| 5 | 5 | Olivia CROFT | 13 | Cheshunt | 3:06.85 |