EVENT 303 Open/Male 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 2 | 4 | Joseph Ball | 16 | | Preston | 1:00.12 |
| 3 | 11 | Alfie Owen | 15 | | Wigan BEST | 1:01.17 |
| 4 | 18 | Owen Whiteley | 18 | | Ramsbottom | 58.15 |
| 5 | 14 | Mackinlay Houghton | 20 | | Halton | 58.45 |
| 6 | 7 | Michael Gillespie | 16 | | Altrincham | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 2 | 5 | Oscar Hodgson | 15 | | Cockermouth | 1:01.11 |
| 3 | 12 | Jack Jarvis | 16 | | Co Manch Aq | 59.31 |
| 4 | 19 | Christos Manoli | 22 | | Uni of Man | 57.66 |
| 5 | 15 | Oliver Parry | 16 | | Aquabears | 58.02 |
| 6 | 8 | Joshua Hayes | 16 | | Wigan BEST | 1:00.30 |
| 7 | 2 | Ethan Maylor | 15 | | Wigan BEST | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 2 | 6 | Fergus Bell | 16 | | Ulverston | 1:00.45 |
| 3 | 13 | Luke Brussels | 16 | | Co Manch Aq | 59.92 |
| 4 | 20 | Jamie Ingram | 26 | | Co Manch Aq | 54.61 |
| 5 | 17 | Daniel Khodaverdi | 15 | | Stockport Mo | 57.72 |
| 6 | 9 | Owen Wilson | 15 | | Ramsbottom | 1:00.51 |
| 7 | 3 | James Fothergill | 16 | | Co Manch Aq | |