EVENT 507 Boy 11 Yrs/Over 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Oliver Horne | 13 | Corby | 11:57.90 |
| 2 | 4 | Oliver Belcher | 14 | Coalville | 10:55.60 |
| 3 | 6 | Joel Harby | 13 | Nova Cent'n | 10:32.66 |
| 4 | 8 | William Taylor | 14 | Louth | 10:24.40 |
| 5 | 7 | William Oxley | 12 | Co Leicester | 10:27.80 |
| 6 | 5 | Harry Simpson | 14 | Coalville | 10:38.80 |
| 7 | 3 | Ryan Bullock | 13 | Co Derby | 11:39.60 |
| 8 | 1 | Isaac Appleton-Corbett | 15 | OadbyWigston | 12:05.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Nitesh Anbazhagan | 16 | South Lincs | 10:13.40 |
| 2 | 12 | Matteo Monaco | 13 | South Lincs | 10:03.89 |
| 3 | 14 | Joseph Storr | 13 | Leic Sharks | 9:58.20 |
| 4 | 16 | Manav Mistry | 15 | Northampton | 9:42.44 |
| 5 | 15 | Oliver Richmond | 14 | Nova Cent'n | 9:51.66 |
| 6 | 13 | Robert Taylor | 17 | Corby | 9:59.36 |
| 7 | 11 | Owen Rafferty | 14 | Bassetlaw SS | 10:12.63 |
| 8 | 9 | G Sierra Villegas | 17 | Chesterfield | 10:16.10 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Finn Reed | 15 | Loughborough | 9:38.80 |
| 2 | 20 | Benjamin Gibbons | 15 | Northampton | 9:28.44 |
| 3 | 22 | Oscar Goldsmith | 14 | South Lincs | 9:21.00 |
| 4 | 24 | Daniel Harris | 15 | Co Leicester | 9:16.10 |
| 5 | 23 | Alfie Bisby | 15 | South Lincs | 9:19.40 |
| 6 | 21 | Alex Sadler | 15 | South Lincs | 9:23.80 |
| 7 | 19 | Oliver Sorrell | 15 | South Lincs | 9:31.70 |
| 8 | 17 | Harrison Clarke | 14 | Nova Cent'n | 9:39.46 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Kallum Quirke | 16 | Nova Cent'n | 9:07.93 |
| 2 | 28 | Luke Stevens | 16 | Leic Sharks | 8:51.10 |
| 3 | 30 | Elliot Sibley | 17 | Nova Cent'n | 8:42.60 |
| 4 | 32 | Jackson O'Rourke | 20 | Northampton | 8:28.29 |
| 5 | 31 | Sean McCann | 17 | Co Leicester | 8:37.89 |
| 6 | 29 | Joseph Palmer | 19 | Nova Cent'n | 8:46.50 |
| 7 | 27 | Findlay Cordle | 15 | Repton Swim | 8:54.40 |
| 8 | 25 | Owen Hathway | 16 | Grantham | 9:08.47 |