EVENT 305 Mens MC 10/18 Yrs 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 3 | 1 | Aidan Stanbrook | 12 | S10 | Durrington | 1:58.75 |
| 4 | 3 | Matthew Davies | 15 | S10 | RomseyTotton | 1:47.29 |
| 5 | 2 | Jamie Markall | 16 | S8 | Orion | 1:49.37 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 4 | Toben Durrant | 14 | S13 | Co Cardiff | 1:37.50 |
| 2 | 6 | Harvey Stonebank | 15 | S14 | RichmondDale | 1:34.46 |
| 3 | 8 | Ethan Naisbitt | 16 | S9 | Pioneer 79 | 1:28.17 |
| 4 | 10 | Liam Hardy | 16 | S14 | Co Manch Aq | 1:24.19 |
| 5 | 9 | Maximilian Tulloch | 14 | S9 | Chalfont | 1:25.33 |
| 6 | 7 | Marcus Harvey | 14 | S14 | Littleh'pton | 1:31.34 |
| 7 | 5 | William Whitehead | 14 | S8 | Eckington | 1:36.30 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 12 | Luke Batty | 14 | S9 | Bolton Metro | 1:18.53 |
| 2 | 14 | Angus Leckonby | 17 | S14 | Scarborough | 1:11.90 |
| 3 | 16 | Owen Garsides | 18 | S14 | KingstonHull | 1:09.31 |
| 4 | 18 | Rhys Davies | 18 | S14 | Pembs Cty | 1:03.10 |
| 5 | 17 | Conor Ballard | 17 | S10 | Leatherhead | 1:05.07 |
| 6 | 15 | Dylan Bleakley | 16 | S14 | East Lothian | 1:11.79 |
| 7 | 13 | Charlie Coulam | 16 | S10 | Bridlington | 1:14.34 |
| 8 | 11 | Balthazar Bradshaw | 13 | S10 | Brompton | 1:23.47 |