EVENT 401 Boy 12 Yrs/Over 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 2 | Matthew JAMES | 14 | | Co Leeds | 10:09.68 |
| 2 | 4 | Harrison MASKREY | 14 | | Donc Dartes | 10:08.30 |
| 3 | 6 | Harry SENIOR | 15 | | Co Leeds | 10:05.92 |
| 4 | 8 | Owen BOYES | 18 | S14 | Blackpool Aq | 9:58.80 |
| 5 | 7 | Maxwell FORD | 14 | | Co Leeds | 10:05.27 |
| 6 | 5 | Luke WINTERBOTTOM | 16 | | Co Bradford | 10:07.56 |
| 7 | 3 | Matteo MONACO | 13 | | South Lincs | 10:08.90 |
| 8 | 1 | Quinn-Austin KELLY | 14 | | Co Bradford | 10:25.12 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 10 | Daniel HILTON | 16 | | Prescot | 9:53.20 |
| 1 | 12 | Josh PINDER | 15 | | Warrington W | 9:51.40 |
| 2 | 14 | Jack PRITCHARD | 15 | | Wigan BEST | 9:42.91 |
| 3 | 16 | Oscar GOLDSMITH | 14 | | South Lincs | 9:21.00 |
| 4 | 18 | Alfie BISBY | 15 | | South Lincs | 9:19.40 |
| 5 | 17 | Jack WHITE | 16 | | Warrington W | 9:19.80 |
| 6 | 15 | Finlay POPE | 15 | | Stockport Mo | 9:21.25 |
| 7 | 13 | Henry FIRTH | 17 | | Co Leeds | 9:48.67 |
| 8 | 11 | Jack BIGNELL | 14 | | Northampton | 9:52.55 |
| 9 | 9 | Lewis BRODIE | 14 | | Stockport Mo | 9:54.30 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 20 | Tom MCCABE | 17 | | Stockport Mo | 9:15.00 |
| 1 | 22 | George DAINTITH | 14 | | Warrington W | 9:12.00 |
| 2 | 24 | Thomas HUDSON | 15 | | Nuneaton | 9:03.80 |
| 3 | 27 | Luke CRITCHLOW | 17 | | Stockport Mo | 8:45.60 |
| 4 | 29 | Max ADAMS | 18 | | Co Salford | 8:28.90 |
| 5 | 28 | Luke BOOTH | 17 | | Rotherham Mo | 8:35.00 |
| 6 | 25 | James PLANT | 16 | | Bo Kirklees | 9:00.45 |
| 7 | 23 | Kourosh KHODAKHAH | 15 | | Co Leeds | 9:06.10 |
| 8 | 21 | William POYSER | 17 | | Leic Sharks | 9:13.50 |
| 9 | 19 | Cohen STEPHENSON | 17 | | Co Leeds | 9:17.16 |