| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Caitlin BOWLES | 12 | Gainsborough | 45.98 |
| 2 | 2 | Honey FLOWER | 12 | Grantham | 45.55 |
| 3 | 3 | Isobel DELDERFIELD | 12 | Co Lincoln P | 43.02 |
| 4 | 4 | Margot MARKS | 12 | Lincoln Vulc | 39.57 |
| 5 | 5 | Ella Bele KHAMA | 12 | Grantham | 41.02 |
| 6 | 6 | Aoife HICKEY | 12 | Deepings | 44.99 |
| 7 | 7 | Hollie-Ann CROOK | 12 | Grantham | 45.66 |
| 8 | 8 | Isla ROBINSON | 12 | Co Lincoln P | 46.29 |