EVENT 312 Mens MC 100m Butterfly NAT - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 3 | 1 | William Whitehead | 05 | S8 | Rotherham Mo | 1:36.30 |
| 4 | 3 | Adam Donnachie | 00 | S8 | Eastkilbride | 1:29.60 |
| 5 | 2 | Ethan Naisbitt | 03 | S9 | Pioneer 79 | 1:33.19 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 6 | Balthazar Bradshaw | 06 | S10 | Chelsea&West | 1:26.98 |
| 1 | 12 | Kyle Hughes | 01 | S9 | Motherwell W | 1:15.63 |
| 2 | 18 | Finlay Middleton | 02 | S8 | Mt Kelly | 1:11.93 |
| 3 | 24 | Dylan Broom | 02 | S14 | Torfaen D | 1:08.94 |
| 4 | 30 | Adam Whyborne | 01 | S10 | Billingham | 1:04.39 |
| 5 | 27 | Jon Law | 97 | S13 | UniOfStirl | 1:05.88 |
| 6 | 21 | Tom Piggott | 00 | S10 | Oswestry Ott | 1:10.88 |
| 7 | 15 | Angus Leckonby | 02 | S14 | Scarborough | 1:13.43 |
| 8 | 9 | Evan Holt | 03 | S14 | Cockermouth | 1:17.52 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 7 | Maximilian Tulloch | 05 | S9 | Chalfont | 1:26.04 |
| 1 | 13 | George Eldredge | 01 | S14 | Brompton | 1:14.97 |
| 2 | 19 | Caleb Grace | 98 | S14 | Littleh'pton | 1:11.03 |
| 3 | 25 | James Edwards | 99 | S14 | Calne Alpha | 1:08.41 |
| 4 | 31 | Rhys Davies | 01 | S14 | Pembs Cty | 1:04.30 |
| 5 | 28 | Louis Lawlor | 02 | S14 | Co Glasgow | 1:05.50 |
| 6 | 22 | Cameron Vearncombe | 02 | S14 | Newquay | 1:10.21 |
| 7 | 16 | Gavin Roberts | 99 | S14 | Co Glasgow | 1:13.34 |
| 8 | 10 | Christopher Currie | 94 | S14 | Co Oxford | 1:17.05 |
| 9 | 4 | Peter Harper | 98 | S14 | Marlborough | 1:28.18 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 8 | Scott Hadley | 98 | S8 | Orion | 1:19.93 |
| 1 | 14 | Owen Garsides | 01 | S14 | KingstonHull | 1:13.58 |
| 2 | 20 | Adam Roebuck | 00 | S14 | Caradon | 1:10.96 |
| 3 | 26 | George Kelman-Johns | 01 | S14 | Clayesmore | 1:06.49 |
| 4 | 32 | Callum Pearson | 96 | S10 | Hastings | 1:04.03 |
| 5 | 29 | Matthew Redfern | 98 | S13 | Worcester | 1:05.48 |
| 6 | 23 | Conor Ballard | 02 | S10 | Leatherhead | 1:09.26 |
| 7 | 17 | Connor Boyfield | 98 | S9 | Boston | 1:12.97 |
| 8 | 11 | Joshua Fairchild | 98 | S14 | Co Coventry | 1:15.80 |
| 9 | 5 | Liam Hardy | 03 | S14 | Co Manch Aq | 1:27.17 |