EVENT 108 Boys 16/17 Yrs 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Brandon Harris | 16 | Kent | 1:00.90 |
| 1 | 4 | Jack Gartside | 16 | Northants | 59.83 |
| 2 | 6 | Joel Muir | 17 | Derbyshire | 59.50 |
| 3 | 8 | Aaron Beckford | 17 | N & Durham | 58.78 |
| 4 | 10 | Joshua Skinner | 16 | Notts | 58.69 |
| 5 | 9 | Liam Brennan | 17 | Essex | 58.69 |
| 6 | 7 | Fraser Wilson | 17 | Scot East | 59.28 |
| 7 | 5 | Finn Jeffery | 16 | Suffolk | 59.56 |
| 8 | 3 | Ethan Jones | 17 | Cheshire | 1:00.11 |
| 9 | 1 | Harry Robinson | 16 | Lancashire | 1:01.85 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Shakil Giordani | 17 | Middlesex | 57.43 |
| 1 | 14 | Zachariah Speakman | 17 | Swim Wales E | 57.07 |
| 2 | 16 | Jonathon Adam | 17 | Shropshire | 55.85 |
| 3 | 18 | Nicholas Skelton | 16 | Ox & N Bucks | 55.71 |
| 4 | 20 | Reuben Visda | 16 | Yorkshire | 55.38 |
| 5 | 19 | Samuel Perks | 17 | Devon | 55.64 |
| 6 | 17 | Mark Ford | 16 | Scot West | 55.76 |
| 7 | 15 | Ioan Evans | 17 | Somerset | 56.99 |
| 8 | 13 | Cameron Brooker | 17 | Berks&SBucks | 57.33 |
| 9 | 11 | Toby Stewart | 16 | Surrey | 57.97 |