| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Mia TOPHAM | 11 | Louth | 50.91 |
| 2 | 2 | Florence HENDERSON | 11 | Lincoln Vulc | 49.08 |
| 3 | 3 | Miley RICHARDSON | 11 | Co Lincoln P | 46.78 |
| 4 | 4 | Zoe JONES | 11 | Louth | 45.26 |
| 5 | 5 | Robyn STEEL | 11 | Co Lincoln P | 46.78 |
| 6 | 6 | Madeleine SEAGROATT | 11 | Louth | 48.32 |
| 7 | 7 | Caitlynn EDMEADES | 11 | Deepings | 49.57 |
| 8 | 8 | Ella Bele KHAMA | 10 | Grantham | 52.06 |