EVENT 301 Boys 12 Yrs/Over 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 1 | Kai Gelsthorpe | 17 | S10 | Rykneld | 10:18.32 |
| 2 | 3 | Cody Bassett | 12 | | Buxton | 12:59.80 |
| 3 | 5 | Ted Pyefinch | 14 | | Long Eaton | 11:42.69 |
| 4 | 7 | Ryan Bullock | 14 | | Long Eaton | 11:54.04 |
| 5 | 6 | Toby Drayson | 12 | | BelperMarlin | 11:14.79 |
| 6 | 4 | Samuel Cooper | 14 | | Long Eaton | 12:21.89 |
| 7 | 2 | Thomas Pope | 12 | | Long Eaton | 12:24.01 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 9 | George Cotton | 13 | | Co Derby | 11:02.70 |
| 1 | 11 | Taylor Reeves | 18 | | Swadlincote | 11:07.60 |
| 2 | 13 | Harry Aston | 15 | | Etwall | 10:18.53 |
| 3 | 15 | Finlay Bird | 13 | | Long Eaton | 9:56.57 |
| 4 | 17 | Ewan Ascott | 18 | | Long Eaton | 10:27.42 |
| 5 | 16 | Liam Lyons | 14 | | BelperMarlin | 9:53.92 |
| 6 | 14 | Aaron Johnson | 17 | | Repton | DN:C . |
| 7 | 12 | Joseph Cooper | 17 | | Long Eaton | 10:41.46 |
| 8 | 10 | Isaac Ebanks | 13 | | Co Derby | 10:45.64 |
| 9 | 8 | Dominic Whiten | 15 | | Swadlincote | 12:04.43 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 19 | Zachary Drayson | 14 | | BelperMarlin | 10:07.96 |
| 1 | 21 | James Ralph | 16 | | Buxton | DN:C . |
| 2 | 23 | Reuben Hubinger | 14 | | Repton | 9:40.05 |
| 3 | 25 | Leo Allanson | 17 | | Ripley | 9:29.68 |
| 4 | 27 | Alexander Harrand | 18 | | Long Eaton | 8:43.73 |
| 5 | 26 | Findlay Cordle | 16 | | Repton | 8:57.21 |
| 6 | 24 | Dylan Jamieson | 15 | | Repton | 9:24.18 |
| 7 | 22 | Oliver Henshaw | 15 | | BelperMarlin | 9:43.43 |
| 8 | 20 | Joshua Atterbury | 17 | | Ripley | 9:37.37 |
| 9 | 18 | Jacob Pemberton | 14 | | Ripley | 9:51.33 |