| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Holly Coleman | 12 | Wellingboro | 40.77 |
| 2 | 2 | Islay-Mae Underwood | 12 | Kettering | 40.51 |
| 3 | 3 | Kennedy McHugh | 12 | Rushden | 39.85 |
| 4 | 4 | Lilly Kowal | 12 | Wellingboro | 38.95 |
| 5 | 5 | Teagan Payne | 12 | Northampton | 39.42 |
| 6 | 6 | Lexie Webb | 12 | Rushden | 40.03 |
| 7 | 7 | Kimberley Hayes | 12 | Kettering | 40.63 |
| 8 | 8 | Edith Kaberry | 12 | Corby | 41.83 |