EVENT 552 Womens Open 50m Butterfly - Semi Final
| Semi-Final - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 2 | Lauren Mills | 97 | Stockport Mo | 28.70 |
| 2 | 3 | Rosie Moore | 98 | Wirral Metro | 28.40 |
| 3 | 4 | Sophie Smith | 94 | Loughboro Un | 27.55 |
| 4 | 5 | Siobhan-Marie O'Connor | 95 | Bath Univ | 26.86 |
| 5 | 6 | Sian Harkin | 94 | Plymouth Lea | 27.06 |
| 6 | 7 | Raquel Matos | 96 | East Lothian | 27.53 |
| 7 | 8 | Brearnna Close | 97 | Co Manch Aq | 28.15 |
| 8 | 9 | Rachel Sharples | 96 | East Lothian | 28.37 |
| Semi-Final - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 12 | Fiona Hardie | 94 | Poole | 28.63 |
| 2 | 13 | Fiona Donnelly | 95 | Nova Cent'n | 28.01 |
| 3 | 14 | Emma Wilkins | 91 | Loughboro Un | 26.92 |
| 4 | 15 | Francesca Halsall | 90 | Loughboro Un | 26.95 |
| 5 | 16 | Rachael Kelly | 94 | Loughboro Un | 27.07 |
| 6 | 17 | Ellen Thomas | 94 | Guildford Ct | 27.51 |
| 7 | 18 | Georgia Barton | 95 | Co Manch Aq | 28.09 |
| 8 | 19 | Emily Jones | 95 | Aberdeen | DN:C . |