EVENT 204 Men 15 Yrs/Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 2 | 2 | Noah Critchley | 16 | | Stretford | 1:17.00 |
| 3 | 4 | Felix Benson | 16 | | Stockport Mo | 1:11.07 |
| 4 | 7 | Daniel Croft | 16 | | Oldham | 1:10.91 |
| 5 | 6 | Charlie Wallace | 16 | | Knutsford | DN:C . |
| 6 | 3 | Joshua Barker | 16 | | St Helens | 1:16.67 |
| 7 | 1 | Theo Whittaker | 16 | | Burnley BOBC | 1:11.57 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 9 | Charles Foster | 15 | | Io Man | 1:10.31 |
| 2 | 11 | Joseph Ball | 15 | | Preston | 1:08.26 |
| 3 | 13 | Flynn Morris | 16 | | Chorley Marl | 1:09.16 |
| 4 | 16 | Thomas Binns | 16 | | Burnley BOBC | 1:08.31 |
| 5 | 15 | Alexander Rowe | 15 | | Co Manch Aq | 1:09.70 |
| 6 | 12 | Adam Cotterell | 15 | | Altrincham | 1:07.62 |
| 7 | 10 | Thomas Hilton | 16 | | Warrington W | 1:09.41 |
| 8 | 8 | Samuel Hyland | 16 | | Halton | 1:12.27 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 18 | Saul Newson-Nixon | 15 | | Cockermouth | 1:07.59 |
| 2 | 20 | Ben Hyde | 16 | | Prescot | 1:08.87 |
| 3 | 22 | Luke Aitken | 15 | | Co Salford | 1:08.58 |
| 4 | 24 | Jack Harmer | 15 | | Satellite | 1:11.01 |
| 5 | 23 | Noah Lyons | 16 | | Co Liverpool | 1:09.44 |
| 6 | 21 | Luke Horton | 16 | | Carnforth | 1:09.02 |
| 7 | 19 | Giorgio Oxby | 18 | S14 | Stockport Mo | 1:12.72 |
| 8 | 17 | Joseph Mahfoud | 15 | | Co Liverpool | 1:07.47 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 26 | Charlie Chadwick | 15 | | Trafford Met | 1:09.08 |
| 2 | 28 | Jared Cross | 16 | | Preston | 1:08.86 |
| 3 | 30 | Hayden Sole | 16 | | Preston | 1:05.67 |
| 4 | 32 | George Denham-Everett | 16 | | Satellite | 1:10.36 |
| 5 | 31 | Jack Jarvis | 15 | | Co Manch Aq | 1:07.17 |
| 6 | 29 | Jackson Jardine | 16 | | Cockermouth | 1:06.23 |
| 7 | 27 | Oliver Moore | 15 | | Crewe Flyers | 1:08.05 |
| 8 | 25 | George Daintith | 15 | | Warrington W | 1:07.97 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 37 | Jaeden Lim | 16 | | Stretford | 1:05.12 |
| 2 | 44 | Dylan Fung | 16 | | Stockport Mo | 1:04.42 |
| 3 | 50 | Berdan Ordek | 15 | | Warrington W | 1:01.67 |
| 4 | 57 | Davey Unwin | 17 | | Stockport Mo | 59.86 |
| 5 | 53 | Joel Birtles | 17 | | Aquabears | 1:01.02 |
| 6 | 47 | Luke Curnyn | 16 | | Co Liverpool | 1:01.75 |
| 7 | 41 | Brandon Taylor | 15 | | Chorley Marl | 1:04.72 |
| 8 | 33 | Michael Gillespie | 15 | | Altrincham | 1:07.08 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 38 | Elliot Mitchell | 16 | | Aquabears | 1:04.38 |
| 2 | 45 | Joseph Ashley | 15 | | Warrington W | 1:02.60 |
| 3 | 51 | Luke Brussels | 15 | | Co Manch Aq | 1:02.06 |
| 4 | 58 | Frankie Docking-Smith | 19 | | Stockport Mo | 1:00.87 |
| 5 | 54 | Ethan Wright | 21 | | Winsford | 1:00.81 |
| 6 | 48 | Oliver Parry | 15 | | Aquabears | 1:01.44 |
| 7 | 42 | Emil Dawkins | 16 | | Preston | 1:06.15 |
| 8 | 34 | Samuel Stout | 16 | | Co Salford | 1:06.07 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 39 | Oliver Salimbeni | 16 | | Co Manch Aq | 1:06.87 |
| 2 | 46 | Oliver Crooks | 16 | | Bolton Metro | 1:02.76 |
| 3 | 52 | Callum Mongan | 16 | | Aquabears | 1:02.60 |
| 4 | 60 | Tom McCabe | 18 | | Stockport Mo | 59.21 |
| 5 | 55 | Xuanming Guo | 16 | | Co Manch Aq | 1:00.94 |
| 6 | 49 | Oli Bottomley | 15 | | Co Salford | 1:02.93 |
| 7 | 43 | Andrew Clavis | 16 | | Prescot | 1:03.32 |
| 8 | 36 | Devon Furneaux-Knight | 15 | | Co Salford | 1:05.52 |