| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Thomasina GROVE | 11 | Chelsea&West | : . |
| 1 | 2 | Jess MAHONY | 12 | Co Peterboro | : . |
| 2 | 3 | Emma ORTIZ | 12 | Hillingdon | : . |
| 3 | 4 | Leah WHITTAKER | 12 | Ealing | : . |
| 4 | 5 | Freya KEMP | 12 | Thanet Swim | : . |
| 5 | 6 | Eva OKARO | 11 | Sevenoaks | : . |
| 6 | 7 | Sophie CHEN | 12 | Hatfield | : . |
| 7 | 8 | Lucy HORMAN | 12 | Co Liverpool | : . |
| 8 | 9 | Jessica DICKINSON | 12 | Swansea Aq | : . |
| 9 | 10 | Gracie COMYN | 12 | Boldmere | : . |