| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Madeleine Watts | 16 | Kettering | 43.37 |
| 2 | 2 | Olivia Hajo | 16 | Corby | 42.88 |
| 3 | 3 | Evie Reamsbottom | 16 | Daventry | 39.58 |
| 4 | 4 | Alice Wallinger | 16 | Wellingboro | 35.36 |
| 5 | 5 | Evelyn Coppa | 16 | Corby | 39.57 |
| 6 | 6 | Kaia Dawson | 16 | Corby | 39.85 |
| 7 | 7 | Amy Anderson | 16 | Corby | 43.37 |
| 8 | 8 | Sofia Ile | 16 | Kettering | 43.90 |