EVENT 121 Boys 14/15 Yrs 100m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Sam Small | 15 | Dorset | 55.98 |
| 1 | 4 | Llion Myers | 15 | Swim Wales W | 55.44 |
| 2 | 6 | Graham Baird | 15 | Scot West | 55.25 |
| 3 | 8 | Lewis Maxwell | 15 | N & Durham | 54.99 |
| 4 | 10 | Kieran Bott | 15 | Leics | 54.72 |
| 5 | 9 | Calvin Fry | 14 | Somerset | 54.73 |
| 6 | 7 | Myles Lapsley | 15 | Scot East | 54.99 |
| 7 | 5 | Silas Mendez | 15 | Berks&SBucks | 55.30 |
| 8 | 3 | Sebastian Vandermeer | 15 | Cambs | 55.61 |
| 9 | 1 | Ciaran Riches | 15 | Suffolk | 56.23 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Charley Langford | 15 | Kent | 54.53 |
| 1 | 14 | Aiden Symons-Brown | 14 | Devon | 54.36 |
| 2 | 16 | Joshua Shaw | 14 | Surrey | 54.25 |
| 3 | 18 | Jamie Hanss | 15 | Ox & N Bucks | 53.37 |
| 4 | 20 | Edward Mildred | 15 | Northants | 52.03 |
| 5 | 19 | Ned Sharp | 15 | Yorkshire | 53.34 |
| 6 | 17 | Alex Griffiths | 15 | Swim Wales E | 54.06 |
| 7 | 15 | Archie Price | 15 | Middlesex | 54.36 |
| 8 | 13 | Daniel Gencas | 15 | Essex | 54.44 |
| 9 | 11 | Tyriese Smith | 14 | Lancashire | 54.54 |