| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Matilda Sharpe | 12 | Co Norwich | 1:18.17 |
| 2 | 2 | Cerys Wall | 12 | Co Cambridge | 1:16.76 |
| 3 | 3 | Mia Wilson | 12 | Basildon Ph | 1:16.40 |
| 4 | 4 | Aimee Sanders | 12 | Dunstable | 1:12.56 |
| 5 | 5 | Olivia Wicks | 12 | Norwich Swan | 1:16.01 |
| 6 | 6 | Valeria Soldatihhina | 11 | West Norfolk | 1:16.47 |
| 7 | 7 | Grace Manning | 12 | Basildon Ph | 1:17.03 |
| 8 | 8 | Tsvetina Sinapova | 12 | Thetford | 1:19.86 |