EVENT 453 Female 15 /Over 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 3 | 1 | Isabella Andreou | 15 | SB9 | Crewe Flyers | |
| 4 | 3 | Phoebe Dyer | 15 | SB9 | Stockport Mo | |
| 5 | 2 | Lhouraii Owens-McAloon | 16 | SB14 | Stretford | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 6 | Sian Morgan | 15 | | Carlisle Aq | |
| 2 | 8 | Grace Ashworth | 15 | | Preston | |
| 3 | 10 | Emmy Rimmer | 16 | | Bridgefield | |
| 4 | 12 | Ashton Wood | 15 | | Ulverston | 1:22.77 |
| 5 | 11 | Lara Challinor | 16 | | Stockport Mo | |
| 6 | 9 | Lina Khider | 15 | | Trafford Met | |
| 7 | 7 | Freya Karaski | 15 | | Halton | |
| 8 | 5 | Isabella Stevens | 15 | | Co Chester | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 14 | Ruby Lloyd | 16 | | Stockport Mo | 1:22.08 |
| 2 | 17 | Megan Templeton | 16 | | Co Liverpool | 1:25.32 |
| 3 | 19 | Joanna Sutton | 15 | | Copeland | 1:24.31 |
| 4 | 21 | Hannah Carradice | 16 | | Kendal | 1:23.72 |
| 5 | 20 | Kathryn Fitton | 16 | | Clitheroe | 1:24.77 |
| 6 | 18 | Gracie Yates | 15 | | Ramsbottom | 1:23.53 |
| 7 | 16 | Pollyanna Hodgson | 15 | | Leyland Barr | |
| 8 | 13 | Genevieve Turner | 15 | | Satellite | 1:21.90 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 23 | Megan Hacking | 16 | | Clitheroe | 1:25.15 |
| 2 | 26 | Laila Lawrenson | 17 | | Preston | |
| 3 | 29 | Caitlyn Rain | 17 | | Altrincham | |
| 4 | 32 | Ellie Johnson | 21 | | Io Man | |
| 5 | 30 | Isabelle Carter | 16 | | Prescot | 1:24.01 |
| 6 | 27 | Dana Juma | 16 | | Blackburn | 1:23.94 |
| 7 | 25 | Lilly Broadfoot | 16 | | Ulverston | |
| 8 | 22 | Aimee Yeung | 15 | | Co Salford | 1:22.88 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 37 | Isabelle Prescott | 15 | | Wigan BEST | 1:22.21 |
| 2 | 44 | Scarlett Robinson | 18 | | Ulverston | 1:19.24 |
| 3 | 50 | Dior Beavan | 17 | | Hoylake | |
| 4 | 56 | Sophie Dixon | 16 | | Leyland Barr | 1:15.41 |
| 5 | 53 | Evie Cutter | 17 | | Wigan BEST | 1:16.76 |
| 6 | 47 | Jasmine D'Cunha | 20 | | Manc Met Uni | 1:17.50 |
| 7 | 40 | Ellen Jones | 15 | | Wigan BEST | 1:22.06 |
| 8 | 33 | Leah Rose | 18 | | Carlisle Aq | |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 38 | Vivien Wilkinson | 15 | | Wirral Metro | 1:23.43 |
| 2 | 45 | Lois Inch | 19 | | Winsford | |
| 3 | 51 | Emily Lines | 17 | | Winsford | 1:16.50 |
| 4 | 57 | Eleanor Armstrong | 16 | | Trafford Met | 1:17.39 |
| 5 | 54 | Elizabeth Adam | 16 | | Leyland Barr | 1:16.66 |
| 6 | 48 | Lucy Shore | 19 | SB14 | Crewe Flyers | 1:19.44 |
| 7 | 42 | Jasmine Rolle | 17 | | Bolton Metro | |
| 8 | 34 | Sophia Stafford | 15 | | Bolton Metro | 1:21.91 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 39 | Jasmine Cadman | 17 | | Carnforth | |
| 2 | 46 | Imogen Clarkson | 15 | | Clitheroe | 1:20.26 |
| 3 | 52 | Lily Horton | 18 | | Wirral Metro | 1:18.64 |
| 4 | 60 | Katie Lee | 18 | | Co Salford | 1:16.39 |
| 5 | 55 | Gabriella Giblin | 17 | | Stockport Mo | 1:17.85 |
| 6 | 49 | Eloise Perritt | 17 | | Knutsford | 1:16.62 |
| 7 | 43 | Pearl O'Brien | 17 | | Stretford | |
| 8 | 35 | Matilda Forrest | 16 | | Bolton Metro | |