EVENT 103 Female 50m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Lucy HODGKINS | 10 | York City | 1:20.00 |
| 3 | 3 | Alice BLACK | 9 | York City | 55.00 |
| 4 | 2 | Elizabeth ALLEN | 8 | York City | 58.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Sofia BROOK | 11 | York City | 50.33 |
| 2 | 7 | Emma ROONEY | 10 | York City | 48.74 |
| 3 | 9 | Jemima HOLDEN | 9 | York City | 48.40 |
| 4 | 8 | Betty HODGEON | 10 | York City | 48.50 |
| 5 | 6 | Rosie TREVOR | 10 | York City | 49.47 |
| 6 | 4 | Amy BUCHANAN | 10 | York City | 53.27 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Esmie TSANG | 12 | York City | 46.71 |
| 2 | 13 | Sophie PHILLIPS | 9 | York City | 46.22 |
| 3 | 15 | Sophie GALLAGHER | 10 | York City | 43.60 |
| 4 | 14 | Lilly LAYTON | 11 | York City | 44.71 |
| 5 | 12 | Hannah PRINCE | 9 | York City | 46.51 |
| 6 | 10 | Georgia VONBERG | 10 | York City | 48.23 |