EVENT 401 Open/Male 09 /Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | George Moss | 11 | Barrow | 1:58.47 |
| 2 | 6 | Oscar Barnes | 10 | Carlisle Aq | 1:43.37 |
| 3 | 9 | Thomas Holliday | 12 | Workington | 1:35.20 |
| 4 | 7 | Milo Williams | 13 | Kendal | 1:37.68 |
| 5 | 5 | Max Nixon | 11 | Carlisle Aq | 1:55.40 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Olly Swarbrick | 12 | Ulverston | 1:27.07 |
| 2 | 13 | Myles Ivinson | 12 | Cockermouth | 1:24.69 |
| 3 | 15 | Alastair Buis | 13 | Carlisle Aq | 1:23.24 |
| 4 | 14 | Ben Davidson | 11 | Workington | 1:24.20 |
| 5 | 12 | Nathaniel Forbes | 12 | Copeland | 1:25.14 |
| 6 | 10 | Caleb Van Haren | 14 | Barrow | 1:29.59 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Connor Wiggins | 14 | Cockermouth | 1:20.93 |
| 2 | 21 | Farron Bigrigg | 14 | Cockermouth | 1:11.18 |
| 3 | 23 | Joseph Todhunter | 15 | Copeland | 1:09.36 |
| 4 | 22 | Kaloyan Nedyalkov | 13 | Workington | 1:11.00 |
| 5 | 20 | Noah Woodyatt | 14 | Ulverston | 1:11.42 |
| 6 | 16 | Harry McDowell | 13 | Copeland | 1:22.82 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 27 | Jonny Fidalgo-Hull | 18 | Cockermouth | 1:06.87 |
| 2 | 29 | Oliver Smith | 29 | Cockermouth | 1:03.00 |
| 3 | 31 | Fergus Bell | 17 | Ulverston | 59.29 |
| 4 | 30 | Oscar Hodgson | 16 | Cockermouth | 59.40 |
| 5 | 28 | Tom Bell | 16 | Barrow | 1:03.30 |
| 6 | 25 | Freddie Sutton | 15 | Copeland | 1:08.50 |