EVENT 107 Female 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Emma ROONEY | 10 | York City | 1:08.82 |
| 3 | 3 | Jemima HOLDEN | 9 | York City | 1:05.00 |
| 4 | 2 | Rosie TREVOR | 10 | York City | 1:06.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Elizabeth ALLEN | 8 | York City | 1:01.01 |
| 2 | 6 | Betty HODGEON | 10 | York City | 1:00.00 |
| 3 | 8 | Sofia BROOK | 11 | York City | 55.11 |
| 4 | 7 | Hannah PRINCE | 9 | York City | 56.52 |
| 5 | 5 | Elizabeth BROWN | 9 | York City | 1:00.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Sophie PHILLIPS | 9 | York City | 52.03 |
| 2 | 12 | Sophie GALLAGHER | 10 | York City | 51.62 |
| 3 | 14 | Alice BLACK | 9 | York City | 47.00 |
| 4 | 13 | Esmie TSANG | 12 | York City | 51.19 |
| 5 | 11 | Lilly LAYTON | 11 | York City | 52.00 |
| 6 | 9 | Amy BUCHANAN | 10 | York City | 54.33 |