EVENT 404 Female 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Charlotte Doyle | 9 | Southport | 1:49.00 |
| 4 | 3 | Annie McEntyre | 10 | Crosby | 1:41.08 |
| 5 | 2 | Ella Gladdish | 10 | Preston | 1:42.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Kitty Dyson | 10 | Southport | 1:40.31 |
| 2 | 7 | Grace Johnson | 11 | Satellite | 1:34.00 |
| 3 | 9 | Saarah Vose | 12 | Blackburn | 1:30.00 |
| 4 | 11 | Neve Connolly | 11 | Leyland Barr | 1:27.46 |
| 5 | 10 | Grace Aylward | 12 | Southport | 1:29.00 |
| 6 | 8 | Ava-Rose Lunt | 11 | Winsford | 1:30.96 |
| 7 | 6 | Eris Coxon | 10 | Winsford | 1:34.11 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | Bethany Makwembere | 11 | Preston | 1:25.70 |
| 2 | 15 | Mollie Ingram | 12 | Leyland Barr | 1:24.75 |
| 3 | 18 | Olivia Batty | 13 | Skipton | 1:22.14 |
| 4 | 21 | Scarlett Fagan | 13 | Co Manch Aq | 1:20.29 |
| 5 | 20 | Molly Lloyd | 13 | Winsford | 1:21.50 |
| 6 | 16 | Niamh Corrigan | 11 | Southport | 1:23.25 |
| 7 | 14 | Emilia Harrison | 11 | Satellite | 1:25.24 |
| 8 | 12 | Felicity Coward | 12 | Leyland Barr | 1:26.27 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Ella Clack | 14 | Satellite | 1:19.99 |
| 2 | 25 | Sofia Davies | 12 | Crosby | 1:19.16 |
| 3 | 27 | Darcie Claxton | 12 | Satellite | 1:18.90 |
| 4 | 29 | Emily Yang | 12 | Co Manch Aq | 1:18.44 |
| 5 | 28 | E Rice- Salisbury | 14 | Carnforth | 1:18.46 |
| 6 | 26 | Grace Mackenzie | 12 | Blackpool Aq | 1:19.01 |
| 7 | 24 | Niamh Whitaker | 13 | Burnley BOBC | 1:19.39 |
| 8 | 22 | Elicia Ricioppo | 15 | Clitheroe | 1:20.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 32 | Jasmine Lloyd | 13 | Winsford | 1:17.64 |
| 2 | 34 | Alexis Aspin | 13 | Preston | 1:17.15 |
| 3 | 36 | Chloe Whittington | 13 | Preston | 1:17.08 |
| 4 | 38 | Evie Robinson | 16 | Carnforth | 1:16.52 |
| 5 | 37 | Frida Ismail-Keyes | 13 | Stretford | 1:16.58 |
| 6 | 35 | Olivia Rowland | 13 | Stretford | 1:17.11 |
| 7 | 33 | Isabella Grimbaldeston | 13 | Leyland Barr | 1:17.31 |
| 8 | 30 | Ruby Oldfield | 13 | Carnforth | 1:18.21 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 40 | Megan Ellis | 13 | Leyland Barr | 1:15.41 |
| 2 | 42 | Abbie Rogerson | 13 | Preston | 1:15.20 |
| 3 | 44 | Ava Grimshaw | 13 | Gt Harwood | 1:14.56 |
| 4 | 46 | Laila Lawrenson | 14 | Preston | 1:13.80 |
| 5 | 45 | Hannah Larmour | 15 | Blackburn | 1:14.02 |
| 6 | 43 | Charlotte Ainscough | 12 | Northwich | 1:15.15 |
| 7 | 41 | Lilah Cairns | 13 | Preston | 1:15.39 |
| 8 | 39 | Niamh Khan | 15 | Co Manch Aq | 1:16.37 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 48 | Maya Smith | 15 | Burnley BOBC | 1:12.60 |
| 2 | 50 | Robyn Sallis | 13 | Carnforth | 1:11.70 |
| 3 | 52 | Megan Doherty | 16 | Leyland Barr | 1:10.70 |
| 4 | 54 | Danielle Brady | 17 | Leyland Barr | 1:07.97 |
| 5 | 53 | Charlotte Middleton | 14 | Leyland Barr | 1:10.21 |
| 6 | 51 | Ayesha Chaudhry | 16 | Chorley Marl | 1:11.56 |
| 7 | 49 | Kristen Beswick | 16 | Preston | 1:12.14 |
| 8 | 47 | Isla-Mae McEvoy | 14 | Stretford | 1:12.84 |