EVENT 708 Mens Open 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 3 | 1 | Thomas Diaper-Fox | 97 | Co South'ton | 8:59.04 |
| 4 | 3 | Thomas Flaherty | 97 | Co Milton K | 8:41.78 |
| 5 | 2 | David Richardson | 97 | Warrington W | 8:42.40 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 5 | Joel Knight | 95 | Millfield | 8:10.89 |
| 1 | 7 | Bradley Lynch | 96 | Co Birm'ham | 8:35.87 |
| 2 | 9 | Daniel Crosby | 94 | Stockport Mo | 8:24.67 |
| 3 | 11 | Oliver Tennant | 93 | Swim Swansea | 8:24.03 |
| 4 | 13 | James Gibson | 91 | Stockport Mo | 8:14.70 |
| 5 | 12 | Alex Dunk | 95 | Prescot | 8:14.76 |
| 6 | 10 | Caleb Hughes | 95 | Hatfield | 8:16.71 |
| 7 | 8 | Martin Cremin | 91 | StirlingSwim | 8:20.29 |
| 8 | 6 | Joseph Poynter | 95 | Millfield | DN:C . |
| 9 | 4 | Cameron Kurle | 97 | Millfield | 8:47.89 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 15 | Ferry Weertman | 92 | NED | 8:11.13 |
| 1 | 17 | Gareth Mills | 93 | Co Leeds | 8:21.96 |
| 2 | 19 | Lewis Smith | 88 | Warrender Ba | 8:27.13 |
| 3 | 21 | Thomas Sunter | 92 | Co Sheffield | 8:08.51 |
| 4 | 23 | Robert Renwick | 88 | Co Glasgow | DN:C . |
| 5 | 22 | Daniel Fogg | 87 | Loughboro Un | 8:05.38 |
| 6 | 20 | James Guy | 95 | Millfield | 8:04.38 |
| 7 | 18 | Jack Burnell | 93 | Loughboro Un | 8:10.61 |
| 8 | 16 | Stephen Milne | 94 | Perth City | 8:09.13 |
| 9 | 14 | Thomas Allen | 92 | Swansea Uni | 8:23.10 |