| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Matilda KOS | 11 | Co Lincoln P | 48.08 |
| 2 | 2 | Eucharia ADEJUWON | 11 | South Lincs | 47.22 |
| 3 | 3 | Juliette KIM | 11 | Grantham | 46.15 |
| 4 | 4 | Alice SOWDEN | 11 | Gainsborough | 39.93 |
| 5 | 5 | Ruby TALKES | 10 | Lincoln Vulc | 45.99 |
| 6 | 6 | Francesca WESTON | 11 | Grantham | 46.33 |
| 7 | 7 | Francesca LORMOR | 11 | Gainsborough | 47.41 |
| 8 | 8 | Annabel HILLSON | 11 | Grantham | 48.55 |