| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Malin FYSON | 12 | South Lincs | 45.51 |
| 2 | 2 | Jimmin BAO | 12 | Grantham | 45.01 |
| 3 | 3 | Dan PALMER | 12 | Co Lincoln P | 43.95 |
| 4 | 4 | Henry DOLAN | 12 | Grantham | 43.29 |
| 5 | 5 | M PARAPIJONAVICIUS | 12 | Grantham | 43.51 |
| 6 | 6 | Oscar HE | 12 | Gainsborough | 44.63 |
| 7 | 7 | Elliot GLEAVE | 12 | Grantham | 45.08 |
| 8 | 8 | Bertie ROSE | 12 | Lincoln Vulc | 45.67 |