EVENT 304 Mens MC 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 2 | 1 | Jacob Chambers | 03 | S8 | Co Manch Aq | 2:02.35 |
| 3 | 3 | James Watson | 04 | S9 | Harrogate | 1:51.07 |
| 4 | 5 | Liam Hardy | 03 | S14 | Co Manch Aq | 1:40.78 |
| 5 | 4 | Samuel Whearty | 02 | S9 | Colchester | 1:45.57 |
| 6 | 2 | William Whitehead | 05 | S8 | Rotherham Mo | 1:51.98 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 1 | 7 | Balthazar Bradshaw | 06 | S10 | Chelsea&West | 1:31.56 |
| 2 | 9 | Evan Holt | 03 | S14 | Cockermouth | 1:24.56 |
| 3 | 11 | Benjamin Grainger | 03 | S10 | Io Man | 1:19.51 |
| 4 | 13 | Kyle Hughes | 01 | S9 | Motherwell W | 1:17.24 |
| 5 | 12 | Christian Buchanan | 01 | S14 | Musselburgh | 1:18.44 |
| 6 | 10 | Luke Batty | 05 | S9 | Bolton Metro | 1:24.18 |
| 7 | 8 | Zackary Merritt | 02 | S15 | Donc Dartes | 1:29.02 |
| 8 | 6 | Maximilian Tulloch | 05 | S9 | Chalfont | 1:37.24 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 1 | 15 | Conor Ballard | 02 | S10 | Leatherhead | 1:15.78 |
| 2 | 17 | Matthew Rishworth | 02 | S10 | Staines | 1:13.29 |
| 3 | 19 | George Kelman-Johns | 01 | S14 | Clayesmore | 1:09.29 |
| 4 | 21 | Jack Milne | 01 | S14 | Dun City Aqu | 1:06.27 |
| 5 | 20 | Adam Whyborne | 01 | S10 | Billingham | 1:07.13 |
| 6 | 18 | Cameron Vearncombe | 02 | S14 | Caradon | 1:10.46 |
| 7 | 16 | Finlay Middleton | 02 | S8 | Mt Kelly | 1:15.00 |
| 8 | 14 | Angus Leckonby | 02 | S14 | Scarborough | 1:17.19 |