| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Arabella Scotney | 18 | Rushden | 40.28 |
| 2 | 2 | Orla Eyton-Jones | 17 | Corby | 39.29 |
| 3 | 3 | Isabel Sharp | 17 | Northampton | 38.79 |
| 4 | 4 | Summer York | 17 | Corby | 36.35 |
| 5 | 5 | Charlotte Mair | 20 | Kettering | 38.69 |
| 6 | 6 | Magenta Kenyon | 18 | Kettering | 38.96 |
| 7 | 7 | Sophia Wiffen | 18 | Corby | 39.29 |
| 8 | 8 | Ruby Cummins | 18 | Wellingboro | 41.17 |