| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Isabelle Pawlowski | 11 | Corby | 46.86 |
| 2 | 2 | Cadence Flynn | 11 | Northampton | 46.55 |
| 3 | 3 | Neve Booker | 11 | Wellingboro | 44.43 |
| 4 | 4 | Phillippa Cutmore | 11 | Corby | 40.62 |
| 5 | 5 | A Thorpe-Williams | 11 | Northampton | 43.84 |
| 6 | 6 | Martha Booker | 11 | Wellingboro | 44.60 |
| 7 | 7 | Carys Thomas | 11 | Nene Valley | 46.69 |
| 8 | 8 | Bhavi-Monisha Gajjala | 11 | Corby | 49.56 |