EVENT 201 Boy Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Joshua MCMILLAN | 11 | Co Leeds | 7:38.69 |
| 4 | 3 | Owen TEMPEST | 11 | Co Leeds | 6:53.40 |
| 5 | 2 | Hogan LAM | 11 | Co Leeds | 6:54.80 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Noah DARNELL | 11 | Co Leeds | 6:41.20 |
| 2 | 7 | Abdullah MOKHLISSE | 13 | Co Leeds | 6:38.20 |
| 3 | 9 | Hudson SMITH | 11 | Co Leeds | 6:24.90 |
| 4 | 11 | James THOMSON | 13 | Co Leeds | 6:06.00 |
| 5 | 10 | Zach PIERCY | 12 | Co Leeds | 6:14.90 |
| 6 | 8 | Oscar O'DONNELL | 10 | Co Leeds | 6:34.29 |
| 7 | 6 | Sebastian HUNTER | 12 | Co Leeds | 6:40.60 |
| 8 | 4 | Callum FOZARD | 11 | Co Leeds | 6:49.80 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 13 | Christopher BARNETT | 14 | Stocksbridge | 6:03.90 |
| 1 | 15 | Alfie YOUNG | 13 | Co Leeds | 5:58.56 |
| 2 | 17 | Charlie WILCOCK | 13 | Ramsbottom | 5:55.00 |
| 3 | 19 | Rhys POWNALL | 13 | Leyland Barr | 5:39.30 |
| 4 | 21 | Gordon BALLANTYNE | 14 | Leyland Barr | 5:36.00 |
| 5 | 20 | Tin Ho CHEUNG | 14 | Co Leeds | 5:37.92 |
| 6 | 18 | William KERSHAW | 12 | Blackpool Aq | 5:53.22 |
| 7 | 16 | Jacob O'DONNELL | 12 | Co Leeds | 5:56.90 |
| 8 | 14 | Oliver BARRETT | 11 | Co Leeds | 6:03.82 |
| 9 | 12 | Jackson CLARKE | 12 | Co Leeds | 6:04.90 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 23 | Harry SENIOR | 15 | Co Leeds | 5:34.58 |
| 1 | 25 | William WILSON | 12 | Co Leeds | 5:30.00 |
| 2 | 27 | Arthur OWENS | 13 | Co Leeds | 5:25.90 |
| 3 | 29 | Samuel HILL | 13 | Co Leeds | 5:23.60 |
| 4 | 31 | Oliver STEELE | 15 | Co Leeds | 5:14.60 |
| 5 | 30 | Ethan COWELL | 13 | Co Leeds | 5:20.20 |
| 6 | 28 | Callum RAVEN | 14 | Co Leeds | 5:25.90 |
| 7 | 26 | Matei STOICESCU | 12 | Co Leeds | 5:28.60 |
| 8 | 24 | Luke DYER | 15 | Co Leeds | 5:30.90 |
| 9 | 22 | Hayden LAM | 12 | Co Leeds | 5:35.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 33 | Joseph HALL | 14 | Co Leeds | 5:10.90 |
| 1 | 36 | Matthew JUST | 14 | Co Leeds | 5:01.70 |
| 2 | 38 | Oliver WHITTLESTON | 15 | Co Leeds | 4:59.13 |
| 3 | 40 | Daniel RANSOM | 14 | Co Leeds | 4:53.60 |
| 4 | 42 | Charlie BROOME | 18 | Co Leeds | 4:31.91 |
| 5 | 41 | Gabriel SHEPHERD | 14 | Co Leeds | 4:45.10 |
| 6 | 39 | Jad IDRIS | 16 | Co Leeds | 4:57.89 |
| 7 | 37 | William HICKLIN | 13 | Co Leeds | 4:59.52 |
| 8 | 35 | George BROOKS | 15 | Co Leeds | 5:02.68 |
| 9 | 32 | Patrick NEILL | 14 | Co Leeds | 5:14.20 |