EVENT 205 Men 17 Yrs/Over 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 2 | 2 | Sebastian Pickering | 05 | Bromley | 1:09.14 |
| 3 | 4 | Oliver Covill | 05 | Co Leicester | 1:08.43 |
| 4 | 6 | Jean-Luc Lovell-Pascal | 05 | Holywell | 1:09.90 |
| 5 | 5 | Jacob Davison | 05 | Chester Le S | 1:07.72 |
| 6 | 3 | Luke Jones | 05 | Bromsgrove | 1:11.11 |
| 7 | 1 | Daniel Oakley | 05 | Winchester | 1:08.36 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 8 | Harry Benzies | 05 | Bassetlaw SS | 1:08.87 |
| 1 | 10 | William Dean | 05 | Maidenhead | 1:07.98 |
| 2 | 12 | Jacob Hudson | 04 | Winchester | 1:09.10 |
| 3 | 14 | Tyler Tombs | 05 | Chelmsford | 1:07.58 |
| 4 | 16 | Matt Burrows | 05 | Sevenoaks | 1:08.12 |
| 5 | 15 | Maxwell Anderson | 05 | Co Cardiff | 1:06.09 |
| 6 | 13 | Isaac Hall | 04 | N & D PP SC | 1:07.97 |
| 7 | 11 | Isaac Zawada | 05 | Teddington | 1:06.72 |
| 8 | 9 | Henry Crust | 05 | Co Lincoln P | 1:07.45 |
| 9 | 7 | Alexander Williams | 05 | Ealing | 1:09.23 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 18 | Buddy Deakes | 04 | Newcastle St | 1:08.69 |
| 1 | 20 | Callum Minshull | 04 | Nofio Clwyd | 1:08.46 |
| 2 | 22 | Emil Morawski | 04 | Warrender Ba | 1:07.97 |
| 3 | 24 | Martin Smith | 04 | Bo Kirklees | 1:07.08 |
| 4 | 26 | Joshua Thompson | 04 | Woking | 1:08.47 |
| 5 | 25 | Sam Williamson | 04 | Mt Kelly | 1:06.45 |
| 6 | 23 | Callum Woolfenden | 05 | Beckenham | 1:08.12 |
| 7 | 21 | Can Tugcetin | 05 | AbingdonVale | 1:07.53 |
| 8 | 19 | Simon Robson | 04 | York City | 1:10.12 |
| 9 | 17 | Micah Van Blerk | 05 | Warrender Ba | 1:08.40 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 28 | Matthew Garrity | 04 | Inverclyde | 1:07.64 |
| 1 | 30 | Harry Stewart | 04 | West Dorset | 1:08.21 |
| 2 | 32 | Ley Ito | 05 | Hackney | 1:06.89 |
| 3 | 34 | Michael Edwards | 04 | Mid Sussex | 1:06.61 |
| 4 | 36 | B Howarth-Osborne | 04 | Co Sheffield | 1:06.64 |
| 5 | 35 | Thomas Halliwell | 04 | Nofio Clwyd | 1:06.97 |
| 6 | 33 | Vadim Bosc | 05 | Co Liverpool | 1:06.07 |
| 7 | 31 | Joe Stratton | 04 | Royal Wolv | 1:06.25 |
| 8 | 29 | Arthur Llewellyn | 04 | N & D PP SC | 1:07.17 |
| 9 | 27 | William Godsell | 05 | Bishop Stort | 1:07.04 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 40 | Alexander Casey | 04 | Co Leicester | 1:05.08 |
| 1 | 46 | Rohan Smith | 04 | Skipton | 1:05.38 |
| 2 | 52 | Nikolai Khutoryanskiy | 03 | Reading | 1:05.82 |
| 3 | 58 | Aneurin Davies | 04 | Swansea Uni | 1:05.46 |
| 4 | 64 | Pravin Mahendrakumar | 03 | Bromley | 1:02.69 |
| 5 | 61 | Rhodri Williams | 02 | Co Liverpool | 1:04.27 |
| 6 | 55 | Rory Dickson | 02 | UniOfStirl | 1:03.62 |
| 7 | 49 | Oliver Taverner | 01 | Loughboro Un | 1:04.96 |
| 8 | 43 | Mackenzie Cannon | 02 | Mid Sussex | 1:05.89 |
| 9 | 37 | Christian Ryan | 05 | N & D PP SC | 1:06.78 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 41 | Ryan Griffiths | 03 | Co Sheffield | 1:05.22 |
| 1 | 47 | Thomas White | 02 | Nova Cent'n | 1:04.81 |
| 2 | 53 | Oliver Jones | 05 | Poole | 1:05.22 |
| 3 | 59 | William Ellington | 03 | UniOfStirl | 1:03.87 |
| 4 | 65 | Matthew Rogers | 00 | Bromley | 1:03.11 |
| 5 | 62 | Lawrence Palmer | 92 | Putteridge | 1:02.61 |
| 6 | 56 | Youssef Betout | 00 | Co Glasgow | 1:04.75 |
| 7 | 50 | Sam Van Der Stroom | 03 | Mt Kelly | 1:05.43 |
| 8 | 44 | Luke Ibbeson | 03 | Loughboro Un | 1:04.93 |
| 9 | 38 | Thomas Cannon | 01 | UniOfStirl | 1:06.48 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 42 | Freddie Laws | 03 | West Norfolk | 1:06.29 |
| 1 | 48 | Karnell Nunes-Smith | 04 | Orion | 1:06.56 |
| 2 | 54 | William Mitchell | 02 | Loughboro Un | 1:03.71 |
| 3 | 60 | Cameron Williams | 04 | Dartmoor DA | 1:03.62 |
| 4 | 66 | Elliot Woodburn | 05 | Millfield | 1:04.33 |
| 5 | 63 | David Bloomfield | 99 | Loughboro Un | 1:03.13 |
| 6 | 57 | Samuel Neeld | 00 | SurreyUni SC | 1:04.07 |
| 7 | 51 | Olivier Vedrenne | 05 | Co Norwich | DQ: . |
| 8 | 45 | Jack Blair | 98 | Chesterfield | 1:05.89 |
| 9 | 39 | Joshua Press | 03 | Co Milton K | 1:06.10 |