EVENT 108 Boys 16/17 Yrs 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Rhys James | 17 | Swim Wales E | 1:01.64 |
| 1 | 4 | Jack Morgans | 17 | Hampshire | 1:00.97 |
| 2 | 6 | Reece Nicholls | 17 | Essex | 59.74 |
| 3 | 8 | Ben Hooper | 17 | Middlesex | 59.00 |
| 4 | 10 | Jakob Goodman | 17 | Somerset | 58.49 |
| 5 | 9 | Harvey Jones | 16 | Cheshire | 58.71 |
| 6 | 7 | Archie Goodburn | 16 | Scot East | 59.47 |
| 7 | 5 | Max Jameson | 17 | Kent | 1:00.00 |
| 8 | 3 | Samuel Avery | 17 | Sussex | 1:01.50 |
| 9 | 1 | Jacob Carrington | 16 | Notts | 1:02.20 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Jacob Peters | 17 | Dorset | 58.20 |
| 1 | 14 | Matthew George | 17 | Lancashire | 57.20 |
| 2 | 16 | Scott Gibson | 17 | Scot West | 56.90 |
| 3 | 18 | Thomas Clare | 16 | Suffolk | 56.76 |
| 4 | 20 | Nick Pyle | 17 | N & Durham | 54.00 |
| 5 | 19 | Charlie Brown | 16 | Yorkshire | 55.90 |
| 6 | 17 | MICHAEL REES | 17 | Surrey | 56.90 |
| 7 | 15 | Ben Harrison | 17 | Devon | 57.20 |
| 8 | 13 | Lewis Gilchrist | 17 | Ox & N Bucks | 58.00 |
| 9 | 11 | ADAM WILKES | 17 | Leics | 58.22 |