EVENT 604 Mens Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Charles Stewart | 71 | Otter | 8:37.93 |
| 4 | 2 | Peter Stephens | 67 | Royal Navy | 7:45.95 |
| 5 | 3 | Derek Parr | 70 | Otter | 7:17.50 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 4 | Keith Spence | 48 | Basingstoke | 7:19.53 |
| 2 | 5 | Stuart McLellan | 65 | Sudbury | 6:59.13 |
| 3 | 6 | David Bell | 43 | Ards Asc | 6:25.26 |
| 4 | 7 | Christopher Thorp | 64 | Co Derby | 7:46.90 |
| 5 | 8 | David Pirrie | 57 | Hemel Hemp | 6:43.59 |
| 6 | 9 | Scott Garrett | 43 | Calne Alpha | 6:36.63 |
| 7 | 10 | John Darby | 47 | Co Oxford | DQ: . |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 11 | Barry Murphy | 52 | Nac Masters | 6:21.12 |
| 2 | 12 | Mark Strakosch | 53 | Berkhamsted | 6:31.20 |
| 3 | 13 | Glen Isaacs | 49 | Black Lion | 6:22.25 |
| 4 | 14 | Mark Shepherd | 50 | St Thomas | DN:C . |
| 5 | 15 | Neil Mitchell | 44 | Basingstoke | 6:07.79 |
| 6 | 16 | Alastair Gibb | 54 | Team Luton | 6:18.91 |
| 7 | 17 | Leigh Wright | 27 | Bletchley | 6:14.58 |
| 8 | 18 | Bryan White | 40 | TauntonDeane | 6:21.45 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 19 | Trevor Clark | 60 | Birmingham M | 6:04.80 |
| 2 | 20 | Stuart Colston | 43 | Cardiff Mast | 6:01.97 |
| 3 | 21 | James Mactavish | 32 | Co South'ton | 5:41.74 |
| 4 | 22 | John Posnett | 29 | Carn Brea | 5:59.25 |
| 5 | 23 | John McCarthy | 54 | Glenalbyn | DN:C . |
| 6 | 24 | Richard Stock | 47 | Leic Peng | 5:44.09 |
| 7 | 25 | Stuart Gibbs | 41 | West Wilts | 5:45.35 |
| 8 | 26 | Andrew Allum | 40 | Wycombe Dist | 5:38.73 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 27 | Andrew Gristwood | 50 | Cleethorpes | 5:58.39 |
| 2 | 28 | Cristian Rentsch | 51 | Spencer | DN:C . |
| 3 | 29 | Jonathan Hopkins | 54 | Cardiff Mast | 5:41.81 |
| 4 | 30 | Mark Jones | 54 | Everton | 5:46.18 |
| 5 | 31 | Guy Armstrong | 32 | Black Lion | 5:45.60 |
| 6 | 32 | Iain Gerrard | 57 | Reading | 6:16.38 |
| 7 | 33 | Ian Pragnell | 52 | Northampton | DN:C . |
| 8 | 34 | Gavin Barlow | 46 | Spencer | DN:C . |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 35 | Matthew Gomez | 48 | Co Oxford | 5:44.34 |
| 2 | 36 | Samuel Chadwick | 35 | Guildford Ct | 5:45.12 |
| 3 | 37 | Gary Wright | 45 | Bromsgrove | 5:38.82 |
| 4 | 38 | Mariusz Barcikowski | 38 | Black Lion | 5:38.52 |
| 5 | 39 | Richard Symons | 40 | Trafford Met | 5:28.11 |
| 6 | 40 | Kyran Parker | 44 | East Leeds | 5:24.84 |
| 7 | 41 | Thomas Cooper | 20 | Bridport Bar | DN:C . |
| 8 | 42 | Pip Bennett | 33 | Otter | 5:24.40 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 44 | Neal Taylor | 29 | Oddicombe | 5:16.34 |
| 2 | 46 | David Smith | 21 | Garioch | 5:15.65 |
| 3 | 48 | Andrew Chamberlain | 41 | Spencer | 4:58.32 |
| 4 | 50 | Andrew Reay | 20 | Warwick Uni | 4:50.38 |
| 5 | 49 | Christopher Malpass | 35 | Co Chester | 5:16.39 |
| 6 | 47 | Nick Valentine | 33 | Gates &Whick | DQ: . |
| 7 | 45 | Lewis King | 24 | Putteridge | 5:21.32 |
| 8 | 43 | Andrew Young | 30 | Camden Swiss | 5:12.14 |