| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Ellena HOWITT | 13 | Grantham | 42.81 |
| 2 | 2 | Erin ARCHER | 13 | Co Lincoln P | 42.37 |
| 3 | 3 | Darcey WOOD | 13 | Grantham | 41.87 |
| 4 | 4 | Maisie MATTHEWS | 13 | Louth | 38.01 |
| 5 | 5 | Amy TAYLOR | 13 | Grantham | 40.79 |
| 6 | 6 | Amy PALMER | 13 | Co Lincoln P | 41.91 |
| 7 | 7 | Lucy WILLATTS | 13 | Grantham | 42.45 |
| 8 | 8 | Sophie FOSTER | 13 | Louth | 44.14 |