EVENT 604 Womens Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Sophie Yendell | 17 | Co Derby | 1:04.48 |
| 4 | 3 | Sacha Thomas | 16 | Co Norwich | 1:04.46 |
| 5 | 2 | Olivia Katory | 15 | Newcastle | 1:04.47 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 4 | Melody Jones | 16 | Bo Stockton | 1:04.32 |
| 2 | 6 | Emily Ford | 17 | Co Oxford | 1:04.30 |
| 3 | 8 | Laura Dickinson | 14 | Lincoln Vulc | 1:04.13 |
| 4 | 10 | Imogen Meers | 17 | Bromley | 1:04.08 |
| 5 | 9 | Jessica McDonough | 17 | Stockport Mo | 1:04.12 |
| 6 | 7 | May Bradburn | 15 | Chelmsford | 1:04.16 |
| 7 | 5 | Henrietta D'Ammassa | 14 | Ellesmere Co | 1:04.31 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 12 | Isabelle Goodwin | 15 | Co Leeds | 1:03.91 |
| 2 | 14 | Ella Chown | 16 | S Bournem'th | 1:03.63 |
| 3 | 16 | Samantha Diaz | 16 | Co Leicester | 1:03.52 |
| 4 | 18 | Chloe Pritchard | 15 | Swansea Aq | 1:03.34 |
| 5 | 17 | Christa Wilson | 16 | Newcastle | 1:03.35 |
| 6 | 15 | Jo Hobsley | 15 | Barnet Copt | 1:03.60 |
| 7 | 13 | Katherine Russell | 17 | Co Leeds | 1:03.80 |
| 8 | 11 | Anya Slessor | 15 | Aberdeen Per | 1:04.04 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 20 | Eleanor Cowan | 17 | Wycombe Dist | 1:03.21 |
| 2 | 22 | Serena Iheagwaram | 17 | Co Glasgow | 1:03.04 |
| 3 | 24 | Abby Jackson | 18 | Crawley | 1:02.98 |
| 4 | 26 | Isabel Jones | 19 | UniOfStirl | 1:02.80 |
| 5 | 25 | Lauren Brantley | 17 | Camden Swiss | 1:02.92 |
| 6 | 23 | Mia Leech | 17 | Co Peterboro | 1:03.02 |
| 7 | 21 | Alisha Stephenson | 17 | Co Birm'ham | 1:03.09 |
| 8 | 19 | Lucy Grieve | 15 | Sth Ayrshire | 1:03.22 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 28 | Jessica Podger | 18 | Millfield | 1:02.69 |
| 2 | 30 | Kate Clifton | 19 | Co Sheffield | 1:02.57 |
| 3 | 32 | Ciara Morris | 17 | Co Cardiff | 1:02.51 |
| 4 | 34 | Amy Bell | 19 | Co Sheffield | 1:02.16 |
| 5 | 33 | Elinor Duley | 19 | Colchester | 1:02.45 |
| 6 | 31 | Elena Morgan | 17 | Nofio Clwyd | 1:02.56 |
| 7 | 29 | Sara Kalawska | 16 | Hatfield | 1:02.58 |
| 8 | 27 | Emma Rowson | 19 | Stockport Mo | 1:02.76 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 38 | Jane Brown | 19 | Newcastle | 1:01.85 |
| 2 | 44 | Yasmin Perry | 18 | Aberdeen Per | 1:01.22 |
| 3 | 50 | Isobel Grant | 21 | Co Sheffield | 1:00.49 |
| 4 | 56 | Harriet Jones | 22 | Co Cardiff | 58.85 |
| 5 | 53 | Laura Stephens | 20 | Plymouth Lea | 59.36 |
| 6 | 47 | Betsy Wizard | 16 | Northampton | 1:00.89 |
| 7 | 41 | Pia Murray | 17 | Ellesmere Co | 1:01.66 |
| 8 | 35 | Alicia Wilson | 19 | Guildford Ct | 1:02.06 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 39 | Gaia Alcaras | 17 | Aberdeen Per | 1:01.85 |
| 2 | 45 | Isabel Spinley | 19 | Stockport Mo | 1:01.21 |
| 3 | 51 | Keanna Macinnes | 18 | UniOfStirl | 59.55 |
| 4 | 57 | Alys Thomas | 29 | Swansea Uni | 58.06 |
| 5 | 54 | Emily Large | 18 | Newcastle | 59.16 |
| 6 | 48 | Maisie Elliott | 16 | Co Leicester | 1:00.83 |
| 7 | 42 | Jasmine McCrea | 18 | Poole | 1:01.64 |
| 8 | 36 | Megan Allison | 17 | Co Newport | 1:02.01 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 40 | Kate Mills | 21 | Loughboro Un | 1:01.66 |
| 2 | 46 | Sophie Freeman | 15 | Plymouth Lea | 1:00.92 |
| 3 | 52 | Harriet West | 22 | Loughboro Un | 59.43 |
| 4 | 58 | Charlotte Atkinson | 23 | Loughboro Un | 57.88 |
| 5 | 55 | Tain Bruce | 21 | Edinburgh Un | 58.92 |
| 6 | 49 | Ciara Schlosshan | 18 | Co Leeds | 1:00.54 |
| 7 | 43 | Freya Anderson | 18 | Ellesmere Co | 1:01.36 |
| 8 | 37 | Emily Haimes | 18 | Mt Kelly | 1:01.85 |