| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 3 | 11 | Zoe Austridge | Blackheath and Bromley Harriers A.C. | U20 | 43.58 | |||
| 2 | 7 | 52 | Tallulah Ndikanwu | Blackheath and Bromley Harriers A.C. | U15 | 44.25 | |||
| 3 | 4 | 228 | Maya Sutaria | Thames Valley Harriers | U15 | 45.05 | |||
| 4 | 5 | 181 | Larissa Wilson | London Heathside Runners A.C. | U15 | 45.56 | |||
| 5 | 6 | 26 | Emily Deveney | Blackheath and Bromley Harriers A.C. | U15 | 47.59 | |||
| 6 | 2 | 120 | Etienne King | Chelmsford A.C. | U15 | 48.20 |
