EVENT 712 Men 17 Yrs/Over 400m Medley Team - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | A.G. | Club | Time |
| 3 | 1 | Tadcaster York Sport D | | Tadcaster | 4:03.84 |
| 4 | 3 | West Norfolk | | West Norfolk | 4:02.77 |
| 5 | 2 | Maidenhead | | Maidenhead | 4:03.50 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | A.G. | Club | Time |
| 0 | 5 | Crawley | | Crawley | 3:59.97 |
| 1 | 9 | Royal Wolverhampton | | Royal Wolv | 3:57.47 |
| 2 | 14 | N & D PP SC | | N & D PP SC | 3:54.82 |
| 3 | 19 | University Of Stirling | | UniOfStirl | 3:50.20 |
| 4 | 23 | Swansea University | | Swansea Uni | 3:48.61 |
| 5 | 21 | Loughborough Uni | | Lboro Uni | 3:49.64 |
| 6 | 16 | Poole | | Poole | 3:52.55 |
| 7 | 11 | Millfield School A | | Millfield | 3:57.25 |
| 8 | 7 | Mount Kelly B | | Mt Kelly | 3:58.58 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | A.G. | Club | Time |
| 0 | 6 | Enfield | | Enfield Sq | 3:59.19 |
| 1 | 10 | Newcastle | | Newcastle | 3:57.37 |
| 2 | 15 | City of Sheffield | | Co Sheffield | 3:53.56 |
| 3 | 20 | Mount Kelly A | | Mt Kelly | 3:49.71 |
| 4 | 24 | City of Cardiff | | Co Cardiff | 3:47.14 |
| 5 | 22 | Plymouth Leander A | | Plymouth Lea | 3:48.62 |
| 6 | 18 | City of Manchester | | Co Manch Aq | 3:51.79 |
| 7 | 12 | Team Bath AS | | Team Bath AS | 3:57.12 |
| 8 | 8 | City of Leeds | | Co Leeds | 3:58.11 |
| 9 | 4 | Dartmoor DA | | Dartmoor DA | 4:00.30 |