| B Final | ||||||
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 1 | Lauren Steadman | 20 | S9 | Portsmouth N | 1:17.63 |
| 1 | 2 | Aine Kelly-Costello | 17 | S11 | New Zealand | 1:25.10 |
| 2 | 3 | Amberley Hoar | 19 | S14 | Portsmouth N | 1:14.60 |
| 3 | 4 | Chloe Selman | 17 | S14 | Bo Barnsley | 1:14.05 |
| 4 | 5 | Shireen Sapiro | 21 | S10 | RSA | 1:11.14 |
| 5 | 6 | Natalie Massey | 23 | S14 | Aquabears | 1:13.06 |
| 6 | 7 | Shu Hang Leung | 25 | S14 | Hong Kong | 1:14.35 |
| 7 | 8 | Claire Cashmore | 24 | S9 | Co Leeds | 1:16.66 |
| 8 | 9 | Yuen Ying Chow | 24 | S14 | Hong Kong | 1:18.35 |
| 9 | 10 | Susannah Rodgers | 29 | S7 | Otter | 1:27.17 |