| B Final | |||||
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 1 | Ben Cope | 01 | Co Sheffield | 49.82 |
| 2 | 2 | Calvin Fry | 04 | Lboro Uni | 49.24 |
| 3 | 3 | Lewis Burras | 00 | Lboro Uni | 49.02 |
| 4 | 4 | Dan Jones | 96 | Swansea Uni | 48.93 |
| 5 | 5 | Jordan Cooley | 99 | Leeds Uni | 48.94 |
| 6 | 6 | Edward Mildred | 03 | Bath PC | 49.03 |
| 7 | 7 | Thomas Watkin | 02 | Millfield | 49.52 |
| 8 | 8 | Evan Jones | 04 | UniOfStirl | 49.96 |