| B Final | |||||
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 1 | Alexander Painter | 04 | Millfield | 49.79 |
| 2 | 2 | Thomas Carswell | 00 | Edinburgh Un | 49.62 |
| 3 | 3 | Thomas Watkin | 02 | Co Sheffield | 49.55 |
| 4 | 4 | Alexander Cohoon | 02 | Lboro Uni | 49.52 |
| 5 | 5 | Evan Jones | 04 | UniOfStirl | 49.52 |
| 6 | 6 | David Cumberlidge | 96 | Edinburgh Un | 49.57 |
| 7 | 7 | Jamie Ingram | 98 | Co Manch Aq | 49.70 |
| 8 | 8 | Dan Jones | 96 | Swansea Uni | 49.95 |