| B Final | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Cameron Kurle | 21 | Bath Univ | 49.68 |
| 1 | 2 | Sam Horrocks | 24 | Co Manch Aq | 49.58 |
| 2 | 3 | Miles Mackenzie | 23 | Loughboro Un | 49.51 |
| 3 | 4 | Joseph Page | 18 | Hamilton UAE | 49.33 |
| 4 | 5 | Jack McMillan | 18 | Bangor IRL | 48.37 |
| 5 | 6 | David Thompson | 25 | Bangor IRL | 49.08 |
| 6 | 7 | James Oxborrow | 20 | Loughboro Un | 49.39 |
| 7 | 8 | Brian O'Sullivan | 23 | Loughboro Un | 49.51 |
| 8 | 9 | Kyle Chisholm | 21 | Stockport Mo | 49.59 |
| 9 | 10 | Harry Stacey | 18 | Shiverers | 49.68 |