| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Saxon Swann | 12 | Corby | 46.95 |
| 2 | 2 | Chloe Perkins | 12 | Kettering | 45.30 |
| 3 | 3 | Teagan Payne | 12 | Northampton | 44.73 |
| 4 | 4 | Islay-Mae Underwood | 12 | Kettering | 41.60 |
| 5 | 5 | Kennedy McHugh | 12 | Rushden | 43.67 |
| 6 | 6 | Esmee Browne | 12 | Rushden | 45.07 |
| 7 | 7 | Sofia Reedha | 12 | Corby | 45.48 |
| 8 | 8 | Kimberley Hayes | 12 | Kettering | 47.27 |