EVENT 121 Boys 14/15 Yrs 100m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Alex Thomson | 15 | Scot East | 56.53 |
| 1 | 4 | Dylan Godfrey | 15 | Ox & N Bucks | 55.58 |
| 2 | 6 | Samuel Tucker | 15 | Berks&SBucks | 55.20 |
| 3 | 8 | Filip Malov | 14 | Surrey | 54.66 |
| 4 | 10 | Metin Mahmutoglu | 15 | Middlesex | 54.56 |
| 5 | 9 | Tom Trueman | 15 | Notts | 54.57 |
| 6 | 7 | Joshua Ellis | 15 | Kent | 54.73 |
| 7 | 5 | Joe Cooper | 15 | Suffolk | 55.54 |
| 8 | 3 | Samuel McCarthy | 14 | Swim Wales E | 56.40 |
| 9 | 1 | Oliver Covill | 14 | Shropshire | 57.83 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Ashley Donaldson | 15 | Cheshire | 54.33 |
| 1 | 14 | Adam Strickland | 15 | N & Durham | 53.90 |
| 2 | 16 | Ruairi McKinnon | 15 | Scot West | 53.25 |
| 3 | 18 | Calvin Fry | 15 | Somerset | 53.12 |
| 4 | 20 | Jacob Whittle | 15 | Derbyshire | 49.97 |
| 5 | 19 | B Howarth-Osborne | 15 | Yorkshire | 52.50 |
| 6 | 17 | Aiden Symons-Brown | 15 | Devon | 53.12 |
| 7 | 15 | Tyriese Smith | 15 | Lancashire | 53.57 |
| 8 | 13 | Alessandro Rioda | 15 | Essex | 54.32 |
| 9 | 11 | Archie Evans | 15 | Northants | 54.44 |