| Final | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Jemima Cross | 11 | Hitchin | 46.93 |
| 2 | 2 | Catherine Clune | 11 | Bishop Stort | 46.20 |
| 3 | 3 | Alexandra Yeabsley | 11 | Hatfield | 44.78 |
| 4 | 4 | Rhiann Manela | 11 | Stevenage | 41.52 |
| 5 | 5 | Eva Lawson | 11 | Berkhamsted | 43.32 |
| 6 | 6 | Janhavi Janhavi | 11 | Watford SC | 44.86 |
| 7 | 7 | Emily Gray | 10 | Hatfield | 46.55 |
| 8 | 8 | Ziying Wang | 11 | Co St Albans | 46.97 |