EVENT 108 Mens MC 100m Breaststroke NAT - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 1 | 2 | Nima Ghavami | 01 | SB7 | Northampton | 2:01.17 |
| 2 | 4 | Owen Woodrow | 01 | SB8 | Co Norwich | 1:50.14 |
| 3 | 6 | Kian Saville | 00 | SB9 | Daventry | 1:46.04 |
| 4 | 8 | William Whitehead | 05 | SB8 | Rotherham Mo | 1:42.94 |
| 5 | 7 | Maximilian Tulloch | 05 | SB8 | Chalfont | 1:43.68 |
| 6 | 5 | Robin Surgeoner | 63 | SB5 | Orion | 1:49.76 |
| 7 | 3 | Adam Donnachie | 00 | SB7 | Eastkilbride | 1:50.42 |
| 8 | 1 | Zach Washington-Young | 90 | SB5 | Co Liverpool | 2:25.41 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 12 | Matthew Harding | 99 | SB5 | Wirral Metro | 1:40.96 |
| 1 | 18 | George Eldredge | 01 | SB14 | Brompton | 1:36.18 |
| 2 | 24 | Charlie Coulam | 03 | SB9 | Bridlington | 1:32.25 |
| 3 | 30 | Owen Garsides | 01 | SB14 | KingstonHull | 1:21.83 |
| 4 | 36 | Rhys Davies | 01 | SB14 | Pembs Cty | 1:15.59 |
| 5 | 33 | James Edwards | 99 | SB14 | Calne Alpha | 1:20.41 |
| 6 | 27 | Connor Boyfield | 98 | SB9 | Boston | 1:25.60 |
| 7 | 21 | Ryan Potter | 03 | SB14 | Blackpool Aq | 1:33.28 |
| 8 | 15 | Owen Say | 01 | SB7 | Bracknell | 1:38.87 |
| 9 | 9 | Rhys Gill | 02 | SB9 | Ythan | 1:42.87 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 13 | William Perry | 00 | SB6 | Mt Kelly | 1:39.95 |
| 1 | 19 | Dominic Redpath | 02 | SB8 | Portsmouth N | 1:35.61 |
| 2 | 25 | Joshua Fairchild | 98 | SB14 | Co Coventry | 1:26.47 |
| 3 | 31 | Adam Roebuck | 00 | SB14 | Caradon | 1:20.97 |
| 4 | 37 | Cameron Vearncombe | 02 | SB14 | Newquay | 1:15.49 |
| 5 | 34 | Lewis Beagrie | 03 | SB9 | Hamilton | 1:19.32 |
| 6 | 28 | Caleb Grace | 98 | SB14 | Littleh'pton | 1:25.58 |
| 7 | 22 | Nathaniel Costigan | 00 | SB12 | Satellite | 1:33.18 |
| 8 | 16 | Luke O'Dowd | 04 | SB13 | South Dorset | 1:37.94 |
| 9 | 10 | Leo McCrea | 03 | SB6 | Bourmth Coll | 1:42.41 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 14 | Conor Freeman | 01 | SB14 | Leic Peng | 1:38.93 |
| 1 | 20 | Mark Snelling | 95 | SB14 | Harrogate | 1:35.17 |
| 2 | 26 | Evan Holt | 03 | SB14 | Cockermouth | 1:26.32 |
| 3 | 32 | Callum Pearson | 96 | SB9 | Hastings | 1:20.63 |
| 4 | 38 | Gavin Roberts | 99 | SB14 | Co Glasgow | 1:11.72 |
| 5 | 35 | George Kelman-Johns | 01 | SB14 | Clayesmore | 1:15.66 |
| 6 | 29 | Angus Leckonby | 02 | SB14 | Scarborough | 1:24.66 |
| 7 | 23 | Matthew Davies | 04 | SB9 | Durrington | 1:33.18 |
| 8 | 17 | Joseph Greaves | 03 | SB14 | Littleh'pton | 1:37.58 |
| 9 | 11 | Scott Hadley | 98 | SB7 | Orion | 1:42.13 |