Final Boys 12 Yrs 400m IM
| Place | Name | AaD | Club | Time | BAG Pt | | 50 | 100 | 150 | 200 | 250 | 300 | 350 |
| 1. | Matthew JOHNSON | 12 | Co Leeds | 4:56.37 | 718 | | 31.35 | 1:06.74 | 1:45.13 | 2:22.40 | 3:05.28 | 3:48.58 | 4:22.89 |
| 2. | Ryan FLANAGAN | 12 | Bo Kirklees | 5:02.09 | 681 | | 32.36 | 1:09.10 | 1:47.69 | 2:25.59 | 3:08.50 | 3:52.50 | 4:28.75 |
| 3. | Oliver BITOWT | 12 | Lincoln Vulc | 5:07.07 | 651 | | 33.72 | 1:12.18 | | 2:27.29 | 3:11.21 | 3:55.86 | 4:32.91 |
| 4. | Miles GARNER | 12 | UEA Norwich | 5:12.54 | 620 | | 33.88 | 1:13.47 | 1:53.83 | 2:32.25 | 3:18.01 | 4:03.87 | 4:39.78 |
| 5. | Elliot MARTIN | 12 | Co Aberdeen | 5:13.65 | 613 | | 33.03 | 1:11.77 | 1:52.59 | 2:33.34 | 3:18.24 | 4:04.38 | 4:39.46 |
| 6. | Joseph SCHOOLING | 12 | Gallica SC | 5:15.16 | 605 | | 32.19 | 1:09.80 | 1:50.06 | 2:29.87 | 3:16.97 | 4:05.29 | 4:40.81 |
| 7. | Matthew GRAHAM | 12 | Co Leeds | 5:18.63 | 586 | | 34.28 | 1:14.66 | 1:54.52 | 2:33.87 | 3:20.27 | 4:06.60 | 4:43.20 |
| 8. | Charlie DENTITH | 12 | BorRedbridge | 5:19.45 | 582 | | 34.97 | 1:15.04 | 1:57.27 | 2:38.54 | 3:24.05 | 4:10.03 | 4:45.65 |
| 9. | Harry PAYNE | 12 | Bo Southend | 5:24.66 | 554 | | 34.81 | 1:14.01 | 1:58.11 | 2:40.92 | 3:28.10 | 4:15.59 | 4:50.23 |
| 10. | Jack SCOTT | 12 | Co Liverpool | 5:29.19 | 533 | | 33.31 | 1:12.06 | 1:53.42 | 2:34.95 | 3:25.03 | 4:15.88 | 4:52.38 |
