| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Isla Johnson | 12 | BelperMarlin | 41.61 |
| 2 | 2 | Sian Hedley | 12 | Nova Cent'n | 41.03 |
| 3 | 3 | Kitty Lamb | 12 | South Lincs | 40.09 |
| 4 | 4 | Isabella Parsons-Loade | 12 | NottmLeander | 38.70 |
| 5 | 5 | Molly Thompson | 12 | Repton | 39.66 |
| 6 | 6 | Caitlyn Richmond | 12 | Nova Cent'n | 40.46 |
| 7 | 7 | Maisie Matthews | 12 | Louth | 41.28 |
| 8 | 8 | Holly Gent | 12 | Coalville | 41.63 |