| Final | |||||
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 1 | Georgia MIDDLETON | 12 | Louth Dolphins SC | 44.20 |
| 2 | 2 | Annie WEBSTER | 12 | Grantham SC | 42.80 |
| 3 | 3 | Lucy ABBOTT | 12 | Grantham SC | 42.39 |
| 4 | 4 | Emily TALKES | 12 | Lincoln Vulcans SC | 34.67 |
| 5 | 5 | Ava MALLOWS | 12 | Louth Dolphins SC | 41.26 |
| 6 | 6 | Freya SHARPE | 12 | Lincoln Vulcans SC | 42.69 |
| 7 | 7 | Miley RICHARDSON | 13 | Lincoln Vulcans SC | 43.53 |
| 8 | 8 | Lucy JENKINSON | 12 | Deepings SC | 44.90 |