| B Final | ||||||
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 1 | Jonathan McGrath | 93 | S8 | Ireland | 4:54.46 |
| 1 | 2 | Matthew Wylie | 96 | S9 | Co Sund'land | 4:41.85 |
| 2 | 3 | Kristijan Vincetic | 91 | S9 | Croatia | 4:36.68 |
| 3 | 4 | Ludvig Nyren | 97 | S10 | Sweden | 4:32.06 |
| 4 | 5 | Kahoru Harazawa | 97 | S10 | Dulwich Dolp | 4:29.87 |
| 5 | 6 | Isaac Bouckley | 94 | S10 | Canada | 4:30.34 |
| 6 | 7 | Emanuel Goncalves | 89 | S10 | Portugal | 4:34.61 |
| 7 | 8 | Lewis White | 00 | S9 | Co Derby | 4:41.05 |
| 8 | 9 | Zack McAllister | 93 | S8 | Canada | 4:51.79 |