| B Final | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Jane Brown | 17 | Newcastle | 28.45 |
| 1 | 2 | Mollie Allen | 19 | Loughboro Un | 28.39 |
| 2 | 3 | Elinah Phillip | 17 | Bishop Stort | 28.35 |
| 3 | 4 | Emily Horne | 20 | Co Glasgow | 28.20 |
| 4 | 5 | Alicia Wilson | 17 | Guildford Ct | 28.01 |
| 5 | 6 | Ciara Schlosshan | 16 | Co Leeds | 28.13 |
| 6 | 7 | Elinor Duley | 17 | Colchester | 28.24 |
| 7 | 8 | Sophie Freeman | 13 | Colchester | 28.38 |
| 8 | 9 | Brearnna Close | 20 | Loughboro Un | 28.39 |