| Senior Men 800 Metres HEAT 1 (Motspur Park, 11 May) | 1 | | T A Browne | (Epsom & Ewell Harriers) | 1:59.1 | | | Q | | 2 | | John Watts | (Aldershot, Farnham & District AC) | 1:59.2 | | | Q | | 3 | | Gary Ribbons | (-) | 1:59.3 | | | Q | | 4 | | Martin Smith | (Polytechnic Harriers) | 2:00.0 | | | q | | 5 | | C Chuter | (Surrey AC) | 2:00.0 | | | q | | 6 | | Ian Grant | (Croydon Harriers) | 2:00.6 | | | | | 7 | | R Barrs-James | (Ranelagh Harriers) | 2:01.0 | | | | |
| | | Senior Men 800 Metres HEAT 2 (Motspur Park, 11 May) | 1 | | S Vary | (Hercules Wimbledon AC) | 1:57.6 | | | Q | | 2 | | Brian Dickens | (Shaftesbury Harriers) | 1:57.9 | | | Q | | 3 | | Michael Rezin | (Aldershot, Farnham & District AC) | 1:58.0 | | | Q | | 4 | | Andrew Layfield | (Epsom & Ewell Harriers) | 1:58.5 | | | q | | 5 | | P Doyle | (St Josephs's College, Upper Norwood) | 2:00.8 | | | | | 6 | | D Askew | (Mitcham AC) | 2:02.9 | | | | | 7 | | N Kirmatzis | (Belgrave Harriers) | 2:03.8 | | | | |
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