| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Poppy Okeife | 13 | Daventry | 45.54 |
| 2 | 2 | Violet French | 13 | Wellingboro | 44.73 |
| 3 | 3 | Everly Favier | 13 | Wellingboro | 42.51 |
| 4 | 4 | Eleni Williams | 13 | Corby | 40.22 |
| 5 | 5 | Vida Coulson | 13 | Northampton | 41.83 |
| 6 | 6 | Emma Chirila | 13 | Kettering | 44.37 |
| 7 | 7 | Megan James | 13 | Wellingboro | 44.75 |
| 8 | 8 | Sophie Marshall | 13 | Corby | 45.66 |