Boys Open 400m IM - Heats (Declared Winners)
Full Results
| Place | Name | YoB | Club | | Time | | | | |
| 1. | Jacob Greenow | (99) | Eng South | | 4:37.83 | | | | |
| | 50m 28.52 | 100m 1:01.33 | 150m 1:37.12 | 200m 2:12.62 | 250m 2:52.76 | 300m 3:32.74 | 350m 4:06.32 | 400m 4:37.83 |
| 2. | Nathan Hughes | (00) | Eng East | | 4:39.90 | | | | |
| | 50m 29.19 | 100m 1:03.32 | 150m 1:39.59 | 200m 2:17.02 | 250m 2:55.56 | 300m 3:35.32 | 350m 4:09.03 | 400m 4:39.90 |
| 3. | Mitchell Wilson | (99) | Ireland | | 4:54.03 | | | | |
| | 50m 28.98 | 100m 1:03.06 | 150m 1:40.87 | 200m 2:19.14 | 250m 3:00.78 | 300m 3:43.78 | 350m 4:19.65 | 400m 4:54.03 |
| 4. | Thomas Balfour | (00) | Scot NW | | 4:55.01 | | | | |
| | 50m 28.85 | 100m 1:02.37 | 150m 1:40.96 | 200m 2:19.71 | 250m 3:02.06 | 300m 3:45.19 | 350m 4:20.67 | 400m 4:55.01 |
| 5. | George Catterall | (99) | Eng North | | 4:55.44 | | | | |
| | 50m 29.20 | 100m 1:03.58 | 150m 1:40.22 | 200m 2:17.19 | 250m 3:01.43 | 300m 3:46.68 | 350m 4:20.93 | 400m 4:55.44 |
| 6. | Fraser Beeby | (99) | Scot SE | | 4:57.40 | | | | |
| | 50m 30.25 | 100m 1:05.15 | 150m 1:44.37 | 200m 2:22.30 | 250m 3:06.54 | 300m 3:50.94 | 350m 4:24.72 | 400m 4:57.40 |
| 7. | Alex Carroll | (99) | Eng Cent | | 5:02.42 | | | | |
| | 50m 30.08 | 100m 1:05.51 | 150m 1:42.64 | 200m 2:19.71 | 250m 3:05.10 | 300m 3:50.70 | 350m 4:26.98 | 400m 5:02.42 |
| | Lewis Fraser | (00) | Wales | | DQ | | | | |
