| Final | |||||
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 1 | Oscar DURANT | 11 | Grantham SC | 46.86 |
| 2 | 2 | Fabian KOLASA | 11 | Grantham SC | 46.35 |
| 3 | 3 | Henry SEAGROATT | 11 | Louth Dolphins SC | 45.25 |
| 4 | 4 | Charlie BISBY | 11 | South Lincs Competitive SC | 41.39 |
| 5 | 5 | Finley ROWDING | 11 | City of Linc Pentaqua SC | 42.18 |
| 6 | 6 | Joel SADLER | 11 | Grantham SC | 46.20 |
| 7 | 7 | Adam JOHNSON | 11 | Louth Dolphins SC | 46.70 |
| 8 | 8 | Kieran BLOOR | 11 | City of Linc Pentaqua SC | 47.83 |