| Final | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Emily Cairncross | 13 | Hitchin | 40.22 |
| 2 | 2 | Olivia Riley | 13 | Hatfield | 39.32 |
| 3 | 3 | Yasmin Meadows | 13 | Co St Albans | 38.43 |
| 4 | 4 | Kirsty Fuge | 13 | Hatfield | 36.90 |
| 5 | 5 | Charlotte Williams | 13 | Cheshunt | 37.99 |
| 6 | 6 | Lilly Blount | 13 | Potters Bar | 39.06 |
| 7 | 7 | Katy Lane | 13 | Co St Albans | 39.53 |
| 8 | 8 | Amber Harber | 13 | Verulam | 40.56 |