EVENT 20 Womens MC 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 1 | Jessica MEECHAM-MUSE | 11 | S15 | Calne Alpha | |
| 2 | 2 | Millicent BYWATER | 17 | S11 | Gloucester | 2:44.44 |
| 3 | 3 | Courtney SIM | 12 | S10 | Gloucester | 2:37.51 |
| 4 | 4 | Genevieve HUNTER | 14 | S8 | Maidstone | 2:18.10 |
| 5 | 5 | Seren LEVAY | 11 | S7 | Gloucester | 2:12.77 |
| 6 | 6 | Sallie PHILLIPS | 17 | S8 | Gloucester | 2:00.57 |
| 7 | 7 | Morgan HOLLAND | 13 | S8 | Chase | 2:00.00 |
| 8 | 8 | Rebecca TURNER | 18 | S14 | Gloucester | 1:59.96 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 10 | Olivia PICKERING | 16 | S9 | Gloucester | 1:52.02 |
| 2 | 12 | Levana HANSON | 16 | S8 | Gloucester | 1:38.82 |
| 3 | 14 | Annalise BURGESS | 15 | S9 | Plymouth Lea | 1:33.95 |
| 4 | 16 | Harriet DICKINSON | 19 | S10 | Clevedon | 1:23.11 |
| 5 | 15 | Katie CROWHURST | 12 | S13 | Wycombe Dist | 1:29.79 |
| 6 | 13 | Katherine HEALEY | 17 | S13 | Bletchley | 1:38.36 |
| 7 | 11 | Madeleine HARRIS | 13 | S9 | Elmbridge | 1:47.59 |
| 8 | 9 | Georgia HOWELL | 14 | S6 | Littleh'pton | 1:53.40 |