| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Sophie Walgate | 11 | Northampton | 47.13 |
| 2 | 2 | Chloe Richardson | 11 | Northampton | 46.58 |
| 3 | 3 | Summer Lancefield | 10 | Northampton | 44.13 |
| 4 | 4 | Sophie Rees | 11 | Northampton | 36.84 |
| 5 | 5 | Annabelle Lucas | 11 | Northampton | 42.36 |
| 6 | 6 | Savannah Koriya | 11 | Northampton | 45.75 |
| 7 | 7 | Eliza Groom | 11 | Corby | 46.77 |
| 8 | 8 | Grace Balneaves | 11 | Northampton | 49.01 |