EVENT 604 Womens Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 3 | 1 | Tegan Drew | 00 | Plymouth Lea | 1:04.14 |
| 4 | 3 | Bailie Harrison | 00 | Deepings | 1:04.12 |
| 5 | 2 | Molly Robinson | 00 | Guildford Ct | 1:04.12 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 2 | 5 | Elena Morgan | 02 | Nofio Clwyd | 1:04.08 |
| 3 | 7 | Jessica Podger | 01 | Co Bristol | 1:04.05 |
| 4 | 9 | Isabel Jones | 00 | Millfield | 1:03.99 |
| 5 | 8 | Ciara Morris | 02 | Co Cardiff | 1:04.00 |
| 6 | 6 | Amie Philpot | 02 | teamipswich | 1:04.05 |
| 7 | 4 | Sophie Yendell | 02 | Co Derby | 1:04.09 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 11 | Emma Harvey | 01 | Millfield | 1:03.92 |
| 2 | 13 | Eleanor Cowan | 02 | Wycombe Dist | 1:03.87 |
| 3 | 15 | Rebecca Pearson | 02 | Stockport Mo | 1:03.75 |
| 4 | 17 | Daisy Anderson | 01 | Thanet Swim | 1:03.66 |
| 5 | 16 | Megan Allison | 02 | Co Newport | 1:03.67 |
| 6 | 14 | Emma Rowson | 00 | Stockport Mo | 1:03.81 |
| 7 | 12 | Rosie Morgan | 03 | Aberdeen Per | 1:03.89 |
| 8 | 10 | Emily Keays | 00 | Co Salford | 1:03.93 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 19 | Rebecca Fisher | 01 | Co Leeds | 1:03.56 |
| 2 | 21 | Debbie Cocking | 01 | Rotherham Mo | 1:03.54 |
| 3 | 23 | Elizabeth Harris | 00 | Stockport Mo | 1:03.49 |
| 4 | 25 | Kaylee Dekker | 02 | Mt Kelly | 1:03.37 |
| 5 | 24 | Alicia Wilson | 00 | Guildford Ct | 1:03.48 |
| 6 | 22 | Jasmine McCrea | 01 | Poole | 1:03.50 |
| 7 | 20 | Gaia Alcaras | 02 | Aberdeen Per | 1:03.56 |
| 8 | 18 | Kayleigh Parker | 00 | Street | 1:03.58 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 27 | Yasmin Perry | 01 | Aberdeen Per | 1:03.19 |
| 2 | 29 | Maisie Elliott | 03 | Co Leicester | 1:03.05 |
| 3 | 31 | Nikki Miller | 00 | Eastkilbride | 1:03.03 |
| 4 | 33 | Spencer Williams | 00 | Brompton | 1:02.92 |
| 5 | 32 | Katelyn Bergin | 01 | Stockport Mo | 1:02.98 |
| 6 | 30 | Ellinor Southward | 01 | Ellesmere Co | 1:03.05 |
| 7 | 28 | Martyna Ruszkowska | 01 | Swim Gwynedd | 1:03.13 |
| 8 | 26 | Katie Laybourn | 01 | Hartlepool | 1:03.34 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 35 | Abby Jackson | 01 | Crawley | 1:02.42 |
| 2 | 37 | Pia Murray | 02 | Ellesmere Co | 1:02.41 |
| 3 | 39 | Emily Jones | 95 | Edinburgh Un | 1:02.11 |
| 4 | 41 | Isabel Spinley | 00 | Deepings | 1:01.97 |
| 5 | 40 | Anna Cheesbrough | 93 | Loughboro Un | 1:01.98 |
| 6 | 38 | Shannon Stott | 00 | Hatfield | 1:02.27 |
| 7 | 36 | Tori Sopp | 00 | Wirral Metro | 1:02.42 |
| 8 | 34 | Jane Brown | 00 | Newcastle | 1:02.58 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 45 | Isobel Grant | 98 | Co Sheffield | 1:01.58 |
| 2 | 51 | Raquel Matos | 96 | Edinburgh Un | 1:00.92 |
| 3 | 57 | Amelia Clynes | 99 | Co Leeds | 1:00.21 |
| 4 | 63 | Rachael Kelly | 94 | Loughboro Un | 59.06 |
| 5 | 60 | Emily Large | 01 | Newcastle | 59.65 |
| 6 | 54 | Emma Day | 97 | Loughboro Un | 1:00.45 |
| 7 | 48 | Anna Fleming | 00 | Co Glasgow | 1:01.35 |
| 8 | 42 | Caitlin Hubbard | 01 | Co Birm'ham | 1:01.92 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 46 | Ciara Schlosshan | 01 | Co Leeds | 1:01.56 |
| 2 | 52 | Anna Newlands | 98 | Edinburgh Un | 1:00.88 |
| 3 | 58 | Holly Hibbott | 99 | Stockport Mo | 1:00.14 |
| 4 | 64 | Alys Thomas | 90 | Swansea Aq | 58.89 |
| 5 | 61 | Siobhan-Marie O'Connor | 95 | Bath Univ | 59.16 |
| 6 | 55 | Harriet Jones | 97 | Co Cardiff | 1:00.29 |
| 7 | 49 | Georgia-Mae Hohmann | 94 | Co Cardiff | 1:01.32 |
| 8 | 43 | Lauren Mills | 97 | UniOfStirl | 1:01.89 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 47 | Orla Dyer | 99 | Co Sheffield | 1:01.54 |
| 2 | 53 | Keanna Macinnes | 01 | Heart Of Mid | 1:00.71 |
| 3 | 59 | Tain Bruce | 98 | Edinburgh Un | 59.95 |
| 4 | 65 | Laura Stephens | 99 | Plymouth Lea | 58.84 |
| 5 | 62 | Charlotte Atkinson | 96 | Loughboro Un | 59.08 |
| 6 | 56 | Harriet West | 97 | Loughboro Un | 1:00.23 |
| 7 | 50 | Kirsty Simpson | 96 | Aberdeen Per | 1:00.99 |
| 8 | 44 | Candice Hall | 97 | Loughboro Un | 1:01.80 |