| Final | |||||
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 1 | Connie MILLNS | 12 | City of Linc Pentaqua SC | 44.06 |
| 2 | 2 | Isla LORMOR | 12 | Gainsborough Dolphins SC | 43.57 |
| 3 | 3 | Charlotte BROWNLESS | 12 | Lincoln Trident Swimming Academy | 42.64 |
| 4 | 4 | Emily TALKES | 12 | Lincoln Vulcans SC | 37.14 |
| 5 | 5 | Ava MALLOWS | 12 | Louth Dolphins SC | 42.02 |
| 6 | 6 | Lucy ABBOTT | 12 | Grantham SC | 43.20 |
| 7 | 7 | Miley RICHARDSON | 13 | Lincoln Vulcans SC | 43.77 |
| 8 | 8 | Georgia MIDDLETON | 12 | Louth Dolphins SC | 44.14 |