| B Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 1 | Jamie Lea MAWER | 17 | Cleethorpes | 1:19.98 |
| 1 | 2 | Dacil WATERS | 15 | Harrogate | 1:19.56 |
| 2 | 3 | Eleanor VALENTINE-BULL | 19 | Bath Univ | 1:19.17 |
| 3 | 4 | Eleanor ARMSTRONG | 15 | Trafford Met | 1:18.83 |
| 4 | 5 | Grace TALBOT | 16 | Leamington | 1:18.04 |
| 5 | 6 | Lola KNIGHTLEY | 17 | Leamington | 1:18.07 |
| 6 | 7 | Poppy NUTTMAN | 15 | Bo Kirklees | 1:19.02 |
| 7 | 8 | Emily JACKSON | 16 | Newcastle | 1:19.54 |
| 8 | 9 | Devon O'NEIL | 15 | Co Peterboro | 1:19.97 |
| 9 | 10 | Emmie HORWELL | 17 | York City | 1:20.05 |