| B Final | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Stella Cookson | 17 | Team Bath AS | 33.44 |
| 1 | 2 | Layla Black | 17 | Co Leeds | 33.11 |
| 2 | 3 | Niamh Robinson | 18 | Mt Kelly | 33.09 |
| 3 | 4 | Rebecca Burton | 19 | Loughboro Un | 32.97 |
| 4 | 5 | Rachael Wilson | 29 | Derwentside | 32.68 |
| 5 | 6 | Jemimah Berkeley | 13 | RTW Monson | 32.89 |
| 6 | 7 | Hannah Miley | 28 | Aberdeen Per | 33.03 |
| 7 | 8 | Tabitha Monkhouse | 22 | Worcester | 33.11 |
| 8 | 9 | Rebecca Clynes | 15 | Co Leeds | 33.14 |
| 9 | 10 | Lily Booker | 16 | Co Bristol | 33.48 |