| Final | |||||
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 1 | Mollie SMART | 14 | Coalville | 48.61 |
| 2 | 2 | River JOLLEY | 15 | Leic Peng | 48.44 |
| 3 | 3 | Cordelia REED | 14 | Melton M'bry | 47.56 |
| 4 | 4 | Ruichen LIU | 14 | Loughborough | 44.99 |
| 5 | 5 | Willow HIBBITT | 15 | Melton M'bry | 46.31 |
| 6 | 6 | Sara CONTRACTOR | 14 | Leic Sharks | 48.20 |
| 7 | 7 | Freya ROSE | 14 | Leic Peng | 48.53 |
| 8 | 8 | Harper THOMPSON | 14 | Hinckley | 48.67 |