| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Olivia KING | 12 | Deepings | 45.69 |
| 2 | 2 | Isla LORMOR | 12 | Gainsborough | 44.55 |
| 3 | 3 | Freya SHARPE | 12 | Lincoln Vulc | 44.44 |
| 4 | 4 | Molly CRAUGHAN | 12 | Lincoln Vulc | 42.42 |
| 5 | 5 | Annie WEBSTER | 12 | Grantham | 44.35 |
| 6 | 6 | Emily TALKES | 12 | Lincoln Vulc | 44.54 |
| 7 | 7 | Lucy ABBOTT | 12 | Grantham | 45.27 |
| 8 | 8 | Remi BERRY | 12 | Co Lincoln P | 45.83 |