EVENT 404 Open/Male 15 /Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 2 | Bogdan Tonu | 15 | | Bolton Metro | |
| 2 | 5 | Zachary Armitage | 15 | | Stockport Mo | 1:04.04 |
| 3 | 7 | Thomas Dale | 15 | | Altrincham | |
| 4 | 9 | Jasper Gibson-Bird | 15 | | Fleetwood | |
| 5 | 8 | James Wilson | 16 | | Stretford | |
| 6 | 6 | Daniel French | 15 | | Wirral Metro | |
| 7 | 4 | William Birchall | 15 | | Satellite | |
| 8 | 1 | Giorgio Oxby | 21 | S14 | Winsford | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 11 | Joe Chadwick | 15 | | Aquabears | |
| 2 | 13 | Joseph Todhunter | 16 | | Copeland | 1:03.94 |
| 3 | 16 | Ethan Stout | 15 | | Co Salford | 1:04.09 |
| 4 | 18 | Samuel Wilson | 15 | | Ramsbottom | 1:03.98 |
| 5 | 17 | Jacob Baker | 15 | | Aquabears | 1:05.48 |
| 6 | 14 | Jacob Agate | 15 | | Halton | |
| 7 | 12 | Zachary Flitton | 16 | | Workington | 1:08.08 |
| 8 | 10 | Max Williams | 15 | | Flixton | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 20 | Dylan Gregory | 15 | | Co Liverpool | 1:04.36 |
| 2 | 22 | Ivan Limbert | 15 | | Stretford | |
| 3 | 24 | Benji Sutcliffe | 15 | | Ramsbottom | |
| 4 | 26 | Ethan Griffin | 18 | | Satellite | |
| 5 | 25 | Archie Sharratt | 16 | | Stockport Mo | 1:03.72 |
| 6 | 23 | James Graham | 15 | | Co Liverpool | 1:03.62 |
| 7 | 21 | Daniel Ashton | 16 | | Blackburn | 1:03.45 |
| 8 | 19 | Oscar Nowak | 16 | | Co Salford | 1:04.62 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 28 | Noah Blemmings | 16 | | Sandbach | 1:02.77 |
| 2 | 30 | Benjamin Rowley | 18 | | Kendal | |
| 3 | 32 | Gus Fraser | 15 | | Winsford | 1:02.96 |
| 4 | 34 | Logan Warburton | 17 | | Preston | |
| 5 | 33 | Elijah Carter | 17 | | Co Chester | |
| 6 | 31 | William Carter | 17 | | Bury & Elton | |
| 7 | 29 | Adam Jones | 21 | | Ulverston | |
| 8 | 27 | James Ellison | 18 | | Knutsford | |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 40 | Ben Stephenson | 15 | | Wirral Metro | 1:02.15 |
| 2 | 48 | Luke Horton | 19 | | Carnforth | |
| 3 | 56 | Callum Mongan | 19 | | Aquabears | 59.94 |
| 4 | 62 | Fergus Bell | 18 | | Ulverston | 1:00.17 |
| 5 | 59 | Alfie Owen | 17 | | Wigan BEST | 59.11 |
| 6 | 52 | Luke Brussels | 18 | | Warrington W | |
| 7 | 44 | Daniel Saunders | 17 | | Blackburn | |
| 8 | 35 | Cain Ashton | 16 | | Stockport Mo | 1:03.05 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 41 | Luke Stefan Nevin Suar | 15 | | Winsford | 1:03.18 |
| 2 | 49 | Harry Moore | 17 | | Stockport Mo | 1:00.49 |
| 3 | 57 | Patrick Harriman | 17 | | Satellite | |
| 4 | 64 | Daniel Khodaverdi | 17 | | Stockport Mo | 56.78 |
| 5 | 60 | Oliver Parry | 18 | | Ramsbottom | 59.44 |
| 6 | 54 | Thomas Binns | 19 | | Burnley BOBC | |
| 7 | 45 | Mason Grady | 16 | | Stockport Mo | 1:02.11 |
| 8 | 38 | Owen Donnelly | 17 | | Clitheroe | |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 42 | Oliver Moore | 18 | | Satellite | 1:00.92 |
| 2 | 50 | Max Henderson | 18 | | Cockermouth | |
| 3 | 58 | Owen Wilson | 17 | | Ramsbottom | 58.88 |
| 4 | 65 | Samuel Sutcliffe | 17 | | Ramsbottom | |
| 5 | 61 | Elliott Hughes | 16 | | Trafford Met | 58.40 |
| 6 | 55 | Oscar Hodgson | 17 | | Cockermouth | 59.68 |
| 7 | 46 | Cole Hood | 16 | | Wigan BEST | 1:02.69 |
| 8 | 39 | James Fothergill | 18 | | Co Manch Aq | |