| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | 159 | Ollie Smith | Harrow A.C. | Sen | 48.35 | |||
| 2 | 3 | 54 | Alex O'callaghan-brown | Blackheath and Bromley Harriers A.C. | U20 | 49.10 | |||
| 3 | 6 | 145 | Michael Uzozie | Dartford Harriers A.C. | U17 | 50.44 | |||
| 4 | 2 | 67 | Pablo Seema roca | Blackheath and Bromley Harriers A.C. | U17 | 51.57 |
