| B Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 1 | Lily HORTON | 16 | Wirral Metro | 1:11.40 |
| 1 | 2 | Hannah LEE | 16 | Wigan BEST | 1:11.31 |
| 2 | 3 | Darcey CROSSLEY | 16 | Co Leeds | 1:10.95 |
| 3 | 4 | Kerry HENNIE | 16 | Co Liverpool | 1:10.22 |
| 4 | 5 | Clara SPENCE | 16 | Carnforth | 1:09.83 |
| 5 | 6 | Mabel HAYES | 18 | Anaconda | 1:10.16 |
| 6 | 7 | Ivy HERNANDEZ TAYLOR | 15 | Hackney | 1:10.82 |
| 7 | 8 | Jessica O'HERLIHY | 18 | South Lincs | 1:11.22 |
| 8 | 9 | Chloe MACDONALD | 16 | York City | 1:11.33 |
| 9 | 10 | Rebecca SMITH | 21 | AJ Newcastle | 1:11.72 |