EVENT 108 Boys 16/17 Yrs 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Archie Plowman | 17 | Northants | 1:01.32 |
| 1 | 4 | Liam McLaughlin | 16 | Scot East | 1:00.99 |
| 2 | 6 | Aaron Beckford | 16 | N & Durham | 59.87 |
| 3 | 8 | Ross Philp | 16 | Middlesex | 59.42 |
| 4 | 10 | Charlie Poole | 17 | Leics | 58.52 |
| 5 | 9 | Samuel Perks | 16 | Essex | 59.13 |
| 6 | 7 | Manfred Battle | 16 | Cambs | 59.64 |
| 7 | 5 | Zachariah Speakman | 16 | Swim Wales E | 1:00.35 |
| 8 | 3 | Andre Strydom | 16 | Kent | 1:01.19 |
| 9 | 1 | Rhys Davies | 17 | Swim Wales W | 1:01.76 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Thomas Clare | 17 | Suffolk | 57.97 |
| 1 | 14 | Oliver Fairman | 16 | Dorset | 57.68 |
| 2 | 16 | Harry Noble | 17 | Devon | 57.45 |
| 3 | 18 | Keir Edgar | 17 | Scot West | 56.83 |
| 4 | 20 | Daniel Jenkins | 17 | Ox & N Bucks | 55.91 |
| 5 | 19 | Charlie Brown | 17 | Yorkshire | 56.74 |
| 6 | 17 | Alexander Armstrong | 17 | Surrey | 57.25 |
| 7 | 15 | Santos Villalon | 17 | Somerset | 57.61 |
| 8 | 13 | Moritz Hoogers | 17 | Berks&SBucks | 57.94 |
| 9 | 11 | Billy Dewhurst | 17 | Lancashire | 58.26 |