| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Sui Chun Yip | 11 | Wellingboro | 46.82 |
| 2 | 2 | Oscar Venn | 11 | Northampton | 45.44 |
| 3 | 3 | Rahul Reedha | 10 | Corby | 45.05 |
| 4 | 4 | Noah Patterson | 10 | Wellingboro | 44.03 |
| 5 | 5 | Jack Tindle | 11 | Northampton | 44.68 |
| 6 | 6 | James Oscroft | 10 | Northampton | 45.22 |
| 7 | 7 | Alexander Stevenson | 11 | Nene Valley | 46.49 |
| 8 | 8 | Percy Green | 10 | Nene Valley | 47.45 |