| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Evie Stanley | 15 | Corby | 44.48 |
| 2 | 2 | Rowan White | 15 | Rushden | 41.55 |
| 3 | 3 | Olivia James | 15 | Wellingboro | 39.12 |
| 4 | 4 | Alice Berrill | 15 | Daventry | 37.73 |
| 5 | 5 | Charlotte Jarman | 15 | Nene Valley | 38.54 |
| 6 | 6 | Annabel Coleman | 15 | Rushden | 41.51 |
| 7 | 7 | Zoe Braisher | 15 | Wellingboro | 44.03 |
| 8 | 8 | Amy McVey | 15 | Northampton | 44.52 |