| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Sophie Walgate | 11 | Northampton | 3:45.48 |
| 2 | 2 | Grace Balneaves | 11 | Northampton | 3:34.36 |
| 3 | 3 | Annabelle Lucas | 11 | Northampton | 3:15.61 |
| 4 | 4 | Sophie Rees | 11 | Northampton | 3:12.33 |
| 5 | 5 | Savannah Koriya | 11 | Northampton | 3:13.99 |
| 6 | 6 | Chloe Richardson | 11 | Northampton | 3:31.82 |
| 7 | 7 | Eliza Groom | 11 | Corby | 3:39.50 |
| 8 | 8 | Catalina Sava | 11 | Corby | 3:53.49 |