| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Daisy-Raie Weekes | 11 | Northampton | 46.07 |
| 2 | 2 | Sophie Walgate | 11 | Northampton | 45.22 |
| 3 | 3 | Grace Balneaves | 11 | Northampton | 43.17 |
| 4 | 4 | Sophie Rees | 11 | Northampton | 38.87 |
| 5 | 5 | Annabelle Lucas | 11 | Northampton | 42.63 |
| 6 | 6 | Savannah Koriya | 11 | Northampton | 44.67 |
| 7 | 7 | Danielle Munday | 11 | Rushden | 45.63 |
| 8 | 8 | Catalina Sava | 11 | Corby | 46.52 |