EVENT 403 Womens Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 2 | 1 | Debbie Cocking | 01 | Rotherham Mo | 1:07.73 |
| 3 | 3 | Gaia Alcaras | 02 | Co Aberdeen | 1:07.51 |
| 4 | 5 | Emily Ford | 02 | AbingdonVale | 1:07.31 |
| 5 | 4 | Rebecca Fisher | 01 | Co Leeds | 1:07.40 |
| 6 | 2 | Ellinor Southward | 01 | Ellesmere Co | 1:07.54 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 7 | Abby Jones | 02 | Southport | 1:07.21 |
| 2 | 9 | Freya Thomson | 01 | Perth City | 1:07.08 |
| 3 | 11 | Thalia Poaros | 01 | Teddington | 1:06.98 |
| 4 | 13 | Natasha Rogan | 01 | Millfield | 1:06.69 |
| 5 | 12 | Rachel Anderson | 02 | Weston S M | 1:06.74 |
| 6 | 10 | Lily Parsons | 01 | Plymouth Lea | 1:07.04 |
| 7 | 8 | Poppy Richardson | 01 | Co Peterboro | 1:07.20 |
| 8 | 6 | Christina Friend | 01 | Staines | 1:07.25 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 15 | Laura Brookes | 01 | Donc Dartes | 1:06.43 |
| 2 | 17 | Brodie Judge | 01 | Hillingdon | 1:05.01 |
| 3 | 19 | Emily Large | 01 | Newcastle | 1:04.62 |
| 4 | 21 | Amelia Chappell | 00 | Clevedon | 1:04.20 |
| 5 | 20 | Keanna Macinnes | 01 | Heart Of Mid | 1:04.48 |
| 6 | 18 | Ellie Molyneux | 01 | Wigan BEST | 1:04.79 |
| 7 | 16 | Amie Philpot | 02 | teamipswich | 1:05.74 |
| 8 | 14 | Katie Laybourn | 01 | Hartlepool | 1:06.46 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 23 | Eve White | 99 | Dumfries | 1:04.09 |
| 2 | 25 | Spencer Williams | 00 | Brompton | 1:03.96 |
| 3 | 27 | Tara Haworth | 99 | Lincoln Vulc | 1:03.84 |
| 4 | 29 | Holly Hildrew | 99 | Romford Town | 1:03.71 |
| 5 | 28 | Eliza Nash | 99 | Co Chester | 1:03.78 |
| 6 | 26 | Kirsty Armstrong | 99 | Warrender Ba | 1:03.93 |
| 7 | 24 | Lauren Hodgson | 99 | Newcastle | 1:03.99 |
| 8 | 22 | Caitlin Hubbard | 01 | Co Birm'ham | 1:04.15 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 31 | Kayleigh Parker | 00 | Yeovil | 1:03.55 |
| 2 | 33 | Katherine Brown | 99 | Co Peterboro | 1:03.35 |
| 3 | 35 | Anna Fleming | 00 | Co Glasgow | 1:03.31 |
| 4 | 37 | Anna Newlands | 98 | Stockport Mo | 1:01.73 |
| 5 | 36 | Holly Hibbott | 99 | Stockport Mo | 1:01.74 |
| 6 | 34 | Lucy Thornton | 99 | Ealing | 1:03.31 |
| 7 | 32 | Madeleine Crompton | 00 | Stockport Mo | 1:03.43 |
| 8 | 30 | Orla Dyer | 99 | Co Sheffield | 1:03.64 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 41 | Tazmin Pugh | 00 | Ellesmere Co | 1:01.60 |
| 2 | 47 | Emily Jones | 95 | Edinburgh Un | 1:01.31 |
| 3 | 53 | Rachel Lefley | 90 | Co Manch Aq | 59.88 |
| 4 | 59 | Rachael Kelly | 94 | Loughboro Un | 58.25 |
| 5 | 56 | Sophie Smith | 94 | Loughboro Un | 59.43 |
| 6 | 50 | Brearnna Close | 97 | Stockport Mo | 1:00.99 |
| 7 | 44 | Laura Stephens | 99 | Plymouth Lea | 1:01.42 |
| 8 | 38 | Katherine Stark | 98 | Warrender Ba | 1:01.71 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 42 | Harriet Jones | 97 | Co Cardiff | 1:01.53 |
| 2 | 48 | Tain Bruce | 98 | Carnegie | 1:01.17 |
| 3 | 54 | Tilly Gray | 91 | Bath Univ | 59.80 |
| 4 | 60 | Jemma Lowe | 90 | Bath Univ | 58.13 |
| 5 | 57 | Alys Thomas | 90 | Swansea Aq | 59.01 |
| 6 | 51 | Emma Day | 97 | Guildford Ct | 1:00.77 |
| 7 | 45 | Rachel Sharples | 96 | Edinburgh Un | 1:01.42 |
| 8 | 39 | Elena Sheridan | 95 | Loughboro Un | 1:01.70 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 43 | Stephanie Blakeburn | 94 | Billingham | 1:01.46 |
| 2 | 49 | Grace Vertigans | 96 | Loughboro Un | 1:01.12 |
| 3 | 55 | Amelia Clynes | 99 | Co Leeds | 59.57 |
| 4 | 61 | Siobhan-Marie O'Connor | 95 | Bath Univ | 57.45 |
| 5 | 58 | Charlotte Atkinson | 96 | Plymouth Lea | 58.68 |
| 6 | 52 | Raquel Matos | 96 | Edinburgh Un | 1:00.02 |
| 7 | 46 | Isobel Grant | 98 | Co Sheffield | 1:01.32 |
| 8 | 40 | Emma Smithurst | 91 | Co Manch Aq | 1:01.68 |