EVENT 305 Mens MC 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 2 | Jamie Markall | 15 | S8 | Orion | 1:49.37 |
| 2 | 4 | James Watson | 14 | S8 | Harrogate | 1:40.95 |
| 3 | 6 | Marcus Harvey | 13 | S14 | Littleh'pton | 1:36.66 |
| 4 | 8 | Reilly Shanahan | 18 | S9 | Shrewsbury | 1:34.83 |
| 5 | 7 | William Whitehead | 13 | S8 | Rotherham Mo | 1:36.30 |
| 6 | 5 | Toben Durrant | 13 | S13 | Co Cardiff | 1:37.50 |
| 7 | 3 | Jacob Chambers | 15 | S8 | Co Manch Aq | 1:45.20 |
| 8 | 1 | Aidan Stanbrook | 11 | S10 | Durrington | 1:58.75 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 10 | Ethan Naisbitt | 15 | S9 | Pioneer 79 | 1:28.17 |
| 2 | 12 | Liam Hardy | 15 | S14 | Co Manch Aq | 1:24.78 |
| 3 | 14 | Aiden Coxhead | 18 | S14 | TR1 Swim | 1:22.94 |
| 4 | 16 | Matthew Scott | 19 | S14 | Bridge O Don | 1:19.81 |
| 5 | 15 | Scott Hadley | 20 | S8 | Orion | 1:19.93 |
| 6 | 13 | Balthazar Bradshaw | 12 | S10 | Brompton | 1:23.47 |
| 7 | 11 | Maximilian Tulloch | 13 | S9 | Chalfont | 1:26.04 |
| 8 | 9 | Zachary Lacey | 18 | S14 | Seaclose | 1:31.68 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 18 | Joshua Fairchild | 20 | S14 | Co Coventry | 1:15.42 |
| 2 | 20 | Connor Boyfield | 20 | S9 | Boston | 1:13.42 |
| 3 | 22 | Dylan Bleakley | 15 | S14 | East Lothian | 1:13.23 |
| 4 | 24 | Andrew Keeler | 22 | S14 | Devonport | 1:12.13 |
| 5 | 23 | Aaron Maddox | 21 | S8 | Amman Valley | 1:12.27 |
| 6 | 21 | Gavin Roberts | 19 | S14 | Co Glasgow | 1:13.34 |
| 7 | 19 | Angus Leckonby | 16 | S14 | Scarborough | 1:13.43 |
| 8 | 17 | Charlie Coulam | 15 | S10 | Bridlington | 1:17.18 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 26 | Joshua Monaghan-Coombs | 20 | S9 | Bath Univ | 1:10.24 |
| 2 | 28 | James Edwards | 19 | S14 | Calne Alpha | 1:08.11 |
| 3 | 30 | Oludaisi Adefisan | 18 | S9 | Nova Cent'n | 1:06.87 |
| 4 | 32 | Liam Spence | 18 | S14 | KingstonHull | 1:05.66 |
| 5 | 31 | Jon Law | 21 | S13 | UniOfStirl | 1:05.88 |
| 6 | 29 | Oliver Carter | 18 | S10 | Carnegie | 1:07.92 |
| 7 | 27 | Tom Piggott | 18 | S10 | Oswestry Ott | 1:08.99 |
| 8 | 25 | Owen Garsides | 17 | S14 | KingstonHull | 1:10.66 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 34 | Louis Lawlor | 16 | S14 | Co Glasgow | 1:05.15 |
| 2 | 36 | Conner Morrison | 21 | S14 | Aberdeen Per | 1:04.76 |
| 3 | 38 | Callum Pearson | 22 | S10 | Hastings | 1:04.03 |
| 4 | 40 | Rhys Davies | 17 | S14 | Pembs Cty | 1:03.47 |
| 5 | 39 | George Kelman-Johns | 17 | S14 | S Bournem'th | 1:03.96 |
| 6 | 37 | Jonathan Booth | 20 | S9 | Bo Kirklees | 1:04.25 |
| 7 | 35 | Conor Ballard | 16 | S10 | Leatherhead | 1:05.07 |
| 8 | 33 | Jack Bridge | 24 | S10 | T North WP | 1:05.57 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 42 | Harry Wellington | 19 | S13 | Salisbury | 1:02.83 |
| 2 | 44 | Jack Milne | 17 | S14 | Dun City Aqu | 1:02.44 |
| 3 | 46 | Jordan Catchpole | 19 | S14 | Co Norwich | 1:00.16 |
| 4 | 48 | Reece Dunn | 23 | S14 | Plymouth Lea | 55.23 |
| 5 | 47 | Tyler Ioannou | 20 | S14 | Wycombe Dist | 59.18 |
| 6 | 45 | Cameron Vearncombe | 16 | S14 | Newquay | 1:02.42 |
| 7 | 43 | Alex Rosser | 22 | S14 | Torfaen D | 1:02.82 |
| 8 | 41 | Barry McClements | 17 | S9 | Ireland | 1:02.93 |