EVENT 103 Mens Open 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Kenan Yeung | 17 | Preston | 1:07.30 |
| 4 | 3 | George Hopkins | 18 | Crawley | 1:07.21 |
| 5 | 2 | Benjamin Lawton | 18 | Team Bath AS | 1:07.28 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 4 | Alexander Boyd | 16 | Thanet Swim | 1:07.21 |
| 2 | 6 | Jonathan Milner | 16 | Co Leeds | 1:07.18 |
| 3 | 8 | Andrew Macintosh | 16 | Eastkilbride | 1:07.16 |
| 4 | 10 | Joseph Murray | 18 | Pioneer 79 | 1:07.11 |
| 5 | 9 | Kyle Booth | 16 | Co Cardiff | 1:07.15 |
| 6 | 7 | Andrew Paige | 18 | Mt Kelly | 1:07.17 |
| 7 | 5 | James Watson | 17 | Plymouth Lea | 1:07.19 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 12 | Benjamin Arkle | 18 | Co Cambridge | 1:06.92 |
| 2 | 14 | Tom Beagley | 17 | Plymouth Lea | 1:06.85 |
| 3 | 16 | Joshua Lawson | 18 | Millfield | 1:06.76 |
| 4 | 18 | George Simmons | 18 | Wycombe Dist | 1:06.62 |
| 5 | 17 | Thomas Speed | 18 | Bo Barnsley | 1:06.66 |
| 6 | 15 | Lewis Waters | 18 | Co Newport | 1:06.83 |
| 7 | 13 | Connor Joyce | 17 | Cockermouth | 1:06.91 |
| 8 | 11 | Adam Metcalf | 16 | Ellesmere Co | 1:07.06 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 20 | Jack O'Brien | 17 | Co Manch Aq | 1:06.53 |
| 2 | 22 | Jasper Lye | 18 | Co Bristol | 1:06.34 |
| 3 | 24 | Liam Bollands | 18 | Middlesboro | 1:06.22 |
| 4 | 26 | Archie Goodburn | 16 | Warrender Ba | 1:05.87 |
| 5 | 25 | Matthew Rogers | 17 | Bromley | 1:05.98 |
| 6 | 23 | Jacob Greenow | 18 | TauntonDeane | 1:06.34 |
| 7 | 21 | David Miller | 18 | Plymouth Lea | 1:06.36 |
| 8 | 19 | Miles Clark | 17 | Ealing | 1:06.56 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 28 | Thomas Dean | 17 | Maidenhead | 1:05.74 |
| 2 | 30 | George Clough | 18 | Warrender Ba | 1:05.50 |
| 3 | 32 | David Bloomfield | 18 | Brompton | 1:05.37 |
| 4 | 34 | Connor Bryan | 17 | Co Oxford | 1:05.13 |
| 5 | 33 | James McFadzen | 18 | Wycombe Dist | 1:05.21 |
| 6 | 31 | Gregory Butler | 17 | Co Derby | 1:05.48 |
| 7 | 29 | Sebastian Stewart | 17 | Sevenoaks | 1:05.72 |
| 8 | 27 | David Shipman | 17 | Potters Bar | 1:05.76 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 36 | Oliver Taverner | 16 | Mt Kelly | 1:05.04 |
| 2 | 38 | Daniel Lim | 21 | Edinburgh Un | 1:04.87 |
| 3 | 40 | Harry James | 22 | Plymouth Lea | 1:04.81 |
| 4 | 42 | William Ritchie | 19 | Preston | 1:04.72 |
| 5 | 41 | Harry Devlin | 17 | York City | 1:04.78 |
| 6 | 39 | Callum Smart | 17 | Co Oxford | 1:04.86 |
| 7 | 37 | Benedict Tortolano | 20 | StirlingSwim | 1:04.87 |
| 8 | 35 | Cameron Muir | 18 | Sth Ayrshire | 1:05.12 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 46 | Joshua Thompson | 19 | Carnforth | 1:04.44 |
| 2 | 52 | Chris Kerr | 24 | Warrender Ba | 1:03.39 |
| 3 | 58 | Andrew Willis | 27 | Bath Univ | 1:02.25 |
| 4 | 64 | Craig Benson | 23 | UniOfStirl | 1:00.63 |
| 5 | 61 | James Wilby | 24 | Loughboro Un | 1:01.26 |
| 6 | 55 | Chris Steeples | 25 | Derventio | 1:02.59 |
| 7 | 49 | Dominic Polling | 20 | Brighton | 1:03.97 |
| 8 | 43 | Yaron Gerber | 19 | Barnet Copt | 1:04.72 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 47 | Oliver Crosby | 18 | Stockport Mo | 1:04.33 |
| 2 | 53 | Lawrence Palmer | 25 | Putteridge | 1:02.84 |
| 3 | 59 | Jamie Graham | 24 | UniOfStirl | 1:01.97 |
| 4 | 65 | Ross Murdoch | 23 | UniOfStirl | 59.47 |
| 5 | 62 | Luke Davies | 20 | Bath Univ | 1:01.12 |
| 6 | 56 | Kieren Preston | 20 | Edinburgh Un | 1:02.52 |
| 7 | 50 | Robert Lancaster | 20 | Loughboro Un | 1:03.64 |
| 8 | 44 | Lewis Fraser | 17 | Swansea Aq | 1:04.67 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 48 | Zak Aitchison | 19 | Millfield | 1:04.27 |
| 2 | 54 | Calum Tait | 23 | Edinburgh Un | 1:02.72 |
| 3 | 60 | David Murphy | 19 | Co Oxford | 1:01.65 |
| 4 | 66 | Adam Peaty | 23 | Loughboro Un | 57.13 |
| 5 | 63 | Charlie Attwood | 20 | Bath Univ | 1:00.82 |
| 6 | 57 | Edward Baxter | 19 | Loughboro Un | 1:02.44 |
| 7 | 51 | Daniel Wallace | 24 | UniOfStirl | 1:03.60 |
| 8 | 45 | James Lewis | 19 | Co Cardiff | 1:04.55 |