EVENT 103 Mens Open 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 1 | 1 | Ethan Naisbitt | 03 | SB8 | Pioneer 79 | |
| 2 | 3 | Benjamin Shewbridge | 06 | SB4 | West Dorset | 3:46.82 |
| 3 | 5 | Aidan Stanbrook | 07 | SB9 | Durrington | 2:36.71 |
| 4 | 7 | George Lewis | 03 | SB7 | Runnymede | 2:27.90 |
| 5 | 6 | Bruce Dee | 06 | SB6 | Northampton | 2:29.85 |
| 6 | 4 | Aiden Watkins | 03 | SB6 | Co Manch Aq | 2:45.65 |
| 7 | 2 | Finlay Middleton | 02 | SB8 | Mt Kelly | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 1 | 9 | Sebastian Williams | 04 | SB6 | Barnet Copt | 2:15.20 |
| 2 | 11 | Levi Codling | 04 | SB7 | Coalville | 2:06.61 |
| 3 | 13 | Jacob Chambers | 03 | SB8 | Co Manch Aq | 2:01.06 |
| 4 | 15 | Leo Pellow | 02 | SB14 | St Ives Bay | 1:57.61 |
| 5 | 14 | Toben Durrant | 05 | SB13 | Co Cardiff | 2:00.47 |
| 6 | 12 | Zachary Tandy | 03 | SB9 | Abertillery | 2:01.10 |
| 7 | 10 | Josh Coomer | 04 | SB6 | Dover Life | 2:13.62 |
| 8 | 8 | Lewis Jones | 06 | SB8 | Littleh'pton | 2:19.70 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 1 | 17 | Liam Hardy | 03 | SB14 | Co Manch Aq | 1:50.41 |
| 2 | 19 | Nathan Carrington | 07 | SB15 | York City | 1:49.39 |
| 3 | 21 | Maximilian Tulloch | 05 | SB8 | Chalfont | 1:47.06 |
| 4 | 23 | William Whitehead | 05 | SB8 | Rotherham Mo | 1:42.94 |
| 5 | 22 | Matthew Davies | 04 | SB9 | Durrington | 1:43.50 |
| 6 | 20 | Luke Batty | 05 | SB9 | Bolton Metro | 1:47.86 |
| 7 | 18 | Owen Woodrow | 01 | SB8 | Co Norwich | 1:50.14 |
| 8 | 16 | Marcus Harvey | 05 | SB14 | Littleh'pton | 1:51.58 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 1 | 25 | Owen Say | 01 | SB7 | Bracknell | 1:38.87 |
| 2 | 27 | Luke O'Dowd | 04 | SB13 | South Dorset | 1:37.90 |
| 3 | 29 | Dominic Redpath | 02 | SB8 | Portsmouth N | 1:36.09 |
| 4 | 31 | Jamie Salvador-Swords | 02 | SB14 | West Dorset | 1:32.43 |
| 5 | 30 | Ryan Potter | 03 | SB14 | Blackpool Aq | 1:35.10 |
| 6 | 28 | Samuel Whearty | 02 | SB8 | Colchester | 1:37.07 |
| 7 | 26 | Joseph Greaves | 03 | SB14 | Littleh'pton | 1:38.58 |
| 8 | 24 | Leo McCrea | 03 | SB6 | Bourmth Coll | 1:42.41 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 1 | 33 | Angus Leckonby | 02 | SB14 | Scarborough | 1:24.66 |
| 2 | 35 | Lewis Beagrie | 03 | SB9 | Hamilton | 1:20.31 |
| 3 | 37 | George Kelman-Johns | 01 | SB14 | Sborne Storm | 1:15.66 |
| 4 | 39 | Jack Milne | 01 | SB14 | Dun City Aqu | 1:12.74 |
| 5 | 38 | Cameron Vearncombe | 02 | SB14 | Newquay | 1:15.49 |
| 6 | 36 | Benjamin Grainger | 03 | SB9 | Mt Kelly | 1:17.79 |
| 7 | 34 | Owen Garsides | 01 | SB14 | KingstonHull | 1:21.83 |
| 8 | 32 | Evan Holt | 03 | SB14 | Cockermouth | 1:26.32 |