| Final | |||||
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 1 | James Gillie | 98 | Millfield | 4:03.73 |
| 2 | 2 | George Taplin | 99 | Maidenhead | 4:03.12 |
| 3 | 3 | Jamie O'Connor | 99 | Thanet Swim | 4:00.92 |
| 4 | 4 | Nathan Hughes | 00 | Hatfield | 3:58.26 |
| 5 | 5 | Samuel Budd | 98 | Co Sheffield | 4:00.51 |
| 6 | 6 | Nathan Wells | 98 | West Norfolk | 4:02.91 |
| 7 | 7 | Max Murphy | 00 | Co Milton K | 4:03.52 |
| 8 | 8 | Thomas Kingham | 98 | Millfield | 4:04.27 |