| Heat Number - 1 | ||||||
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 2 | Eliza Humphrey | 18 | S11 | Northampton | 1:28.22 |
| 1 | 4 | Connie Ratley | 15 | S9 | Colchester | 1:23.80 |
| 2 | 6 | Imogen Dodds | 14 | S13 | Wellingboro | 1:22.46 |
| 3 | 8 | Rebecca Lewis | 20 | S10 | RCT Squad | 1:18.80 |
| 4 | 10 | Saskia Webb | 16 | S14 | Pembs Cty | 1:14.29 |
| 5 | 9 | Meghan Willis | 16 | S10 | Torfaen D | 1:16.63 |
| 6 | 7 | Amber Haycock | 16 | S10 | Northampton | 1:19.82 |
| 7 | 5 | Chiara Fellone | 16 | S14 | Co Salford | 1:23.66 |
| 8 | 3 | Evie Lambert | 16 | S9 | Bo Kirklees | 1:24.88 |
| 9 | 1 | Katie Pake | 15 | S10 | Carnegie | 1:30.60 |