EVENT 308 Boys Open 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Jad IDRIS | 11 | Co Leeds | 25:02.35 |
| 2 | 2 | Jack SENIOR | 13 | Co Leeds | 22:28.00 |
| 3 | 3 | Louis AINLEY | 13 | Co Leeds | 22:28.00 |
| 4 | 4 | Samuel EMMETT | 12 | Co Leeds | 22:00.00 |
| 5 | 5 | Joshua SUTCLIFFE | 12 | Co Leeds | 21:58.93 |
| 6 | 6 | Dominic MATHIAS | 12 | Co Leeds | 21:38.90 |
| 7 | 7 | Alex BOYER | 10 | Darlington | 21:08.84 |
| 8 | 8 | James ROBINSON | 12 | Co Leeds | 21:07.40 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 9 | Elliott WATKINS | 12 | Co Leeds | 20:50.35 |
| 1 | 10 | Finlay WILLIAMS | 13 | Co Leeds | 20:30.00 |
| 2 | 11 | Charlie BROOME | 13 | Co Leeds | 20:22.48 |
| 3 | 12 | George KNOWLES | 12 | Co Leeds | 20:00.00 |
| 4 | 13 | Emilio PANIAGUA-GUTIER | 13 | Co Leeds | 20:00.00 |
| 5 | 14 | Benjamin WILKINSON | 13 | Whitby | 19:55.50 |
| 6 | 15 | Henry FIRTH | 12 | Co Leeds | 19:35.02 |
| 7 | 16 | Johnson BACHE | 14 | Darlington | 19:33.20 |
| 8 | 17 | Rohan O'NEILL | 17 | Trafford Met | 19:04.51 |
| 9 | 18 | Joseph BURNELL | 14 | Co Leeds | 19:04.43 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 20 | Matthew LYONS | 14 | Co Leeds | 18:45.00 |
| 1 | 22 | Callum TONKINS | 14 | Team Jorvik | 18:15.00 |
| 2 | 24 | Akal.S. REHAL | 14 | Co Leeds | 17:59.20 |
| 3 | 26 | Joseph SENIOR | 17 | Team Jorvik | 17:45.00 |
| 4 | 28 | Tiago LAWRIE | 16 | Trafford Met | 17:42.57 |
| 5 | 27 | Dalton CLAPHAM | 14 | Co Leeds | 17:44.10 |
| 6 | 25 | Jamie BROOME | 15 | Co Leeds | 17:53.33 |
| 7 | 23 | Joe CALLIN | 13 | Team Jorvik | 18:00.00 |
| 8 | 21 | Harrison LEE | 13 | Co Wakefield | 18:38.83 |
| 9 | 19 | Joseph WARD | 14 | Grimsby AST | 18:50.03 |