EVENT 411 Open/Male 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Oscar O'DONNELL | 12 | Co Leeds | 5:45.45 |
| 2 | 3 | Oscar FOCHT | 12 | KingstonHull | 5:35.50 |
| 3 | 5 | Jackson CLARKE | 14 | Co Leeds | 5:29.38 |
| 4 | 7 | Reuben HARRISON | 14 | Co Leeds | 5:26.57 |
| 5 | 6 | Jacob O'DONNELL | 14 | Co Leeds | 5:28.63 |
| 6 | 4 | Gabriel BARNETT | 13 | Blackpool Aq | 5:29.70 |
| 7 | 2 | William DUNN | 13 | Co Leeds | 5:39.41 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 9 | Patrick O'HARA | 14 | Co Leeds | 5:16.30 |
| 1 | 11 | Owen CARMODY | 14 | Co Leeds | 5:15.71 |
| 2 | 13 | Hayden LAM | 14 | Co Leeds | 5:14.18 |
| 3 | 15 | Matei STOICESCU | 14 | Co Leeds | 5:12.90 |
| 4 | 17 | Zac BAUGHAN-WITHINGTON | 14 | KingstonHull | 5:08.40 |
| 5 | 16 | Thomas ROBERTS | 16 | Hackney | 5:09.30 |
| 6 | 14 | Connor MCCULLEN | 14 | Co Leeds | 5:14.10 |
| 7 | 12 | Dylan HILL | 14 | KingstonHull | 5:15.40 |
| 8 | 10 | James VAUGHAN | 14 | Wigan BEST | 5:15.76 |
| 9 | 8 | Cain ASHTON | 14 | Wigan BEST | 5:20.90 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 20 | Samuel HILL | 15 | Co Leeds | 5:06.20 |
| 1 | 24 | Aaron WHARTON | 21 | RichmondDale | 4:59.60 |
| 2 | 28 | Jad IDRIS | 18 | Co Leeds | 4:54.26 |
| 3 | 32 | Callum AITKEN | 18 | York City | 4:49.60 |
| 4 | 37 | Daniel RANSOM | 16 | Co Leeds | 4:37.14 |
| 5 | 34 | Cameron RHODES | 19 | Rotherham Mo | 4:46.30 |
| 6 | 30 | Ben GILCHRIST | 23 | RichmondDale | 4:51.20 |
| 7 | 26 | Arthur OWENS | 15 | Co Leeds | 4:57.20 |
| 8 | 22 | Joseph PICKERING | 17 | KingstonHull | 5:00.10 |
| 9 | 18 | Ethan COWELL | 15 | Co Leeds | 5:08.20 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 21 | Jack PRITCHARD | 17 | Wigan BEST | 5:06.17 |
| 1 | 25 | Joseph HALL | 16 | Co Leeds | 4:59.05 |
| 2 | 29 | Alfie OWEN | 15 | Wigan BEST | 4:52.80 |
| 3 | 33 | Cameron MCQUADE | 17 | Cosacss | 4:47.10 |
| 4 | 38 | Luke CLEGG | 19 | Swansea Uni | 4:35.78 |
| 5 | 36 | James ESCOLME | 18 | Carnforth | 4:44.57 |
| 6 | 31 | Patrick NEILL | 16 | Co Leeds | 4:50.00 |
| 7 | 27 | Oscar GOLDSMITH | 16 | South Lincs | 4:55.20 |
| 8 | 23 | Matthew JAMES | 16 | Co Leeds | 4:59.73 |
| 9 | 19 | William WILSON | 14 | Co Leeds | 5:07.75 |