EVENT 408 Boys/Girls 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Jokubas RUDYS | 12 | Bassetlaw SS | 12:31.47 |
| 3 | 3 | Isla STOCKLEY | 11 | Bassetlaw SS | 12:02.19 |
| 4 | 2 | Corey HESELTINE | 11 | Bassetlaw SS | 12:05.82 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Noah DEWSNAP | 12 | Bassetlaw SS | 11:20.32 |
| 2 | 7 | Isobelle RAFFERTY | 12 | Bassetlaw SS | 11:00.23 |
| 3 | 9 | Imogen HOWITT | 11 | Bassetlaw SS | 10:50.32 |
| 4 | 8 | Charlotte JENKINSON | 13 | Deepings | 11:00.02 |
| 5 | 6 | Tate FOX | 12 | Bassetlaw SS | 11:00.70 |
| 6 | 4 | Charlotte DENON | 13 | Eckington | 12:00.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Evie LILLEY | 14 | Bassetlaw SS | 10:12.08 |
| 2 | 13 | C BUTTERELL-QUANBROUGH | 13 | Bassetlaw SS | 9:55.50 |
| 3 | 15 | Samuel GREEN | 13 | Bassetlaw SS | 9:13.10 |
| 4 | 14 | Lacey GRAYSON | 15 | Rotherham Mo | 9:51.10 |
| 5 | 12 | Jacob HARNESS | 13 | Bassetlaw SS | 10:00.00 |
| 6 | 10 | Freddie WOOD | 13 | Rotherham Mo | 10:15.00 |