EVENT 501 Boy Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Olaf GRUDOWSKI | 11 | Co Leeds | 7:25.50 |
| 4 | 3 | Issac HIGGINS | 11 | Leyland Barr | 6:51.80 |
| 5 | 2 | James TUNSTALL | 13 | Leyland Barr | 6:52.40 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 5 | Harry DIXON | 9 | Co Leeds | 6:35.00 |
| 1 | 7 | Max CLARK | 11 | Co Leeds | 6:22.37 |
| 2 | 9 | Ciaran HARTLEY | 13 | Chorley Marl | 6:16.70 |
| 3 | 11 | Hogan LAM | 11 | Co Leeds | 6:11.30 |
| 4 | 13 | Oliver NIXON | 10 | Biddulph | 6:00.00 |
| 5 | 12 | Demilade AYEMOWA | 12 | Co Leeds | 6:09.10 |
| 6 | 10 | Oscar HUSSEY | 10 | Co Leeds | 6:16.50 |
| 7 | 8 | Callum FOZARD | 11 | Co Leeds | 6:18.00 |
| 8 | 6 | Angus YOUNG | 11 | Co Leeds | 6:26.70 |
| 9 | 4 | George KING | 10 | Co Leeds | 6:40.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 15 | Noah DARNELL | 11 | Co Leeds | 5:52.30 |
| 1 | 17 | Zach PIERCY | 12 | Co Leeds | 5:46.31 |
| 2 | 19 | Archie HONEY | 11 | Blackpool Aq | 5:41.60 |
| 3 | 21 | Ed PEARSON | 11 | Io Man | 5:36.20 |
| 4 | 23 | Ryan MILNER | 13 | Co Leeds | 5:27.16 |
| 5 | 22 | Connor MCCULLEN | 12 | Co Leeds | 5:31.91 |
| 6 | 20 | Nicholas CASS | 12 | Bo Kirklees | 5:40.60 |
| 7 | 18 | Dean NENOV | 13 | Co Leeds | 5:41.95 |
| 8 | 16 | William SHEARS | 13 | Chorley Marl | 5:52.10 |
| 9 | 14 | Hudson SMITH | 11 | Co Leeds | 5:56.63 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 25 | Jackson CLARKE | 12 | Co Leeds | 5:18.64 |
| 1 | 27 | Theo WHITTAKER | 15 | Burnley BOBC | 5:15.00 |
| 2 | 29 | Sam SIGLEY | 12 | Leek | 5:12.70 |
| 3 | 31 | Matei STOICESCU | 12 | Co Leeds | 5:09.30 |
| 4 | 33 | Gordon BALLANTYNE | 14 | Leyland Barr | 5:07.10 |
| 5 | 32 | Noah CARTLIDGE | 12 | Biddulph | 5:08.40 |
| 6 | 30 | James THOMSON | 13 | Co Leeds | 5:12.44 |
| 7 | 28 | George BELLWOOD | 14 | Co Wakefield | 5:15.00 |
| 8 | 26 | Oliver BARRETT | 11 | Co Leeds | 5:15.30 |
| 9 | 24 | Ollie SIGLEY | 11 | Leek | 5:21.50 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 35 | William KERSHAW | 12 | Blackpool Aq | 5:06.03 |
| 1 | 37 | James FARNAN | 12 | Io Man | 5:02.50 |
| 2 | 39 | Oliver NUTTER | 14 | Burnley BOBC | 4:56.59 |
| 3 | 41 | Matthew MENZER | 15 | Co Wakefield | 4:55.30 |
| 4 | 43 | Ethan MCGUINNESS | 13 | Ramsbottom | 4:54.80 |
| 5 | 42 | Isaac SHAW | 13 | Preston | 4:54.90 |
| 6 | 40 | William WILSON | 12 | Co Leeds | 4:55.96 |
| 7 | 38 | Ethan COWELL | 13 | Co Leeds | 5:01.52 |
| 8 | 36 | Matthew DANTON | 22 | Leeds Uni | 5:04.80 |
| 9 | 34 | Harry GILLIGAN | 15 | Bo Kirklees | 5:06.34 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 45 | Luke DYER | 15 | Co Leeds | 4:52.10 |
| 1 | 47 | Oliver STEELE | 15 | Co Leeds | 4:41.00 |
| 2 | 49 | Oscar DEVAAL | 13 | Biddulph | 4:39.40 |
| 3 | 51 | Louis CASS | 15 | Bo Kirklees | 4:37.30 |
| 4 | 53 | Finlay WILLIAMS | 18 | Leeds Uni | 4:35.35 |
| 5 | 52 | Jad IDRIS | 16 | Co Leeds | 4:36.62 |
| 6 | 50 | Samuel SUTCLIFFE | 13 | Ramsbottom | 4:37.53 |
| 7 | 48 | Joseph HALL | 14 | Co Leeds | 4:39.40 |
| 8 | 46 | Cody BRIDGE | 14 | Blackpool Aq | 4:47.22 |
| 9 | 44 | Hayden LAM | 12 | Co Leeds | 4:53.50 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 55 | Louie DOVE | 19 | Leeds Uni | 4:33.80 |
| 1 | 57 | Shea WHITELEY | 16 | Ramsbottom | 4:30.00 |
| 2 | 59 | Matthew JUST | 14 | Co Leeds | 4:28.40 |
| 3 | 61 | Gabriel SHEPHERD | 14 | Co Leeds | 4:18.10 |
| 4 | 63 | Ben SHELTON | 18 | Co Leeds | 4:10.05 |
| 5 | 62 | Charlie BROOME | 18 | Co Leeds | 4:15.30 |
| 6 | 60 | George BROOKS | 15 | Co Leeds | 4:24.70 |
| 7 | 58 | Charlie HINSON | 14 | Co Leeds | 4:28.50 |
| 8 | 56 | Daniel RANSOM | 14 | Co Leeds | 4:32.80 |
| 9 | 54 | Matthew JAMES | 14 | Co Leeds | 4:34.20 |