| Final | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Elijah Britton | 13 | St Felix Sch | 1:21.66 |
| 2 | 2 | Lucy Buckingham | 13 | Putteridge | 1:21.32 |
| 3 | 3 | Olivia Cooper | 13 | Basildon Ph | 1:20.45 |
| 4 | 4 | Matilda Ransome | 13 | Co Cambridge | 1:20.17 |
| 5 | 5 | Macy Dexter | 13 | Co Cambridge | 1:20.18 |
| 6 | 6 | Beth Young | 13 | Felixstowe | 1:20.68 |
| 7 | 7 | Kirsty Fuge | 13 | Hatfield | 1:21.43 |
| 8 | 8 | Sophie Clerkin | 13 | Braintree | 1:22.30 |