EVENT 101 Boys Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Harry LEWIS | 11 | Tadcaster | 7:44.80 |
| 3 | 3 | Lucas PIERCY | 11 | Co Leeds | 6:57.72 |
| 4 | 5 | Callum RAVEN | 11 | Co Leeds | 6:46.72 |
| 5 | 4 | Koby ORD | 11 | Rotherham Mo | 6:56.00 |
| 6 | 2 | Joseph HALL | 11 | Co Leeds | 6:58.81 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 7 | Hari MONTGOMERY | 12 | Co Leeds | 6:38.83 |
| 1 | 9 | William HICKLIN | 10 | Co Leeds | 6:30.00 |
| 2 | 11 | Maxwell FORD | 11 | Co Leeds | 6:13.70 |
| 3 | 13 | Luke DYER | 12 | Co Leeds | 6:07.60 |
| 4 | 15 | Nathan DULAY | 13 | Co Leeds | 6:03.20 |
| 5 | 14 | James ADKIN | 12 | Co Leeds | 6:05.70 |
| 6 | 12 | Nathan MARTIN | 13 | Chapeltown | 6:10.00 |
| 7 | 10 | Bradley WILSON | 14 | Chapeltown | 6:28.40 |
| 8 | 8 | Jack FINNIE | 12 | Rotherham Mo | 6:32.63 |
| 9 | 6 | Alexander TEW | 10 | Team Jorvik | 6:40.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 17 | Jacob GOODWIN | 13 | Co Leeds | 5:49.70 |
| 1 | 19 | Jack BROWN | 12 | Grimsby AST | 5:45.84 |
| 2 | 21 | Cameron RHODES | 14 | Rotherham Mo | 5:40.60 |
| 3 | 23 | Kalum SMART | 15 | Bo Barnsley | 5:26.49 |
| 4 | 25 | Simon ROBSON | 15 | York City | 5:24.20 |
| 5 | 24 | Noah WRAGG | 16 | Bo Barnsley | 5:25.30 |
| 6 | 22 | William BACON | 14 | Co Leeds | 5:36.48 |
| 7 | 20 | George HARRIS | 15 | Kippax | 5:45.50 |
| 8 | 18 | Jamie BROADHURST | 13 | Co Leeds | 5:48.40 |
| 9 | 16 | Theodore ROSENBERG | 12 | Co Leeds | 5:51.23 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 27 | Solomon HODGSON | 13 | Co Leeds | 5:19.80 |
| 1 | 29 | Harrison LEE | 15 | Co Wakefield | 5:18.58 |
| 2 | 31 | Luke GILLIVER | 12 | Donc Dartes | 5:12.70 |
| 3 | 33 | Callum MELVILLE | 13 | Nova Cent'n | 5:03.99 |
| 4 | 35 | Matthew SELOUS | 16 | Bo Barnsley | 4:51.10 |
| 5 | 34 | Toby MAYFIELD | 15 | York City | 4:52.90 |
| 6 | 32 | James DOBNEY | 15 | Grantham | 5:09.46 |
| 7 | 30 | Connor ROBINSON | 17 | Chapeltown | 5:17.20 |
| 8 | 28 | Kourosh KHODAKHAH | 12 | Co Leeds | 5:18.70 |
| 9 | 26 | George KNOWLES | 14 | Co Leeds | 5:23.66 |