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| Senior Men 400 Metres HEAT 1 (Motspur Park, 15 May) | 1 | | Bolaji Odunsi | (Croydon Harriers) | 50.4 | | | | | 2 | | J P Fernee | (Epsom & Ewell Harriers) | 51.8 | | | | | 3 | | L Silva | (Metropolitan Police AC) | 54.4 | | | | | 4 | | D Cleary | (Mitcham AC) | 55.3 | | | | | 5 | | M Quinlan | (Sutton & Cheam Harriers) | 55.8 | | | | | 6 | | P Monaghan | (Mitcham AC) | 56.9 | | | | |
| | | Senior Men 400 Metres HEAT 2 (Motspur Park, 15 May) | 1 | | Paul Batten | | 51.1 | | | | | 2 | | Keith Andrew | (Hercules Wimbledon AC) | 53.1 | | | | | 3 | | A Paton | (Belgrave Harriers) | 53.8 | | | | | 4 | | C Pullen | (Aldershot, Farnham & District AC) | 54.5 | | | | | 5 | | Alexander Nisbett | (Croydon Harriers) | 55.1 | | | | | 6 | | D Brown | (South London Harriers) | 55.3 | | | | |
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| Senior Men 400 Metres HEAT 3 (Motspur Park, 15 May) | 1 | | C Sagar | (Belgrave Harriers) | 51.7 | | | | | 2 | | M Jackson | (S&E) | 52.2 | | | | | 3 | | R Chapman | (South London Harriers) | 54.1 | | | | | 4 | | P Parish | (Herne Hill Harriers) | 55.6 | | | | | 5 | | M Johnson | (Hercules Wimbledon AC) | 55.8 | | | | |
| | | Senior Men 400 Metres HEAT 4 (Motspur Park, 15 May) | 1 | | C Knight | (Worth) | 51.4 | | | | | 2 | | Maurice Evans | (Herne Hill Harriers) | 51.5 | | | | | 3 | | Jonathan Owen | (Hercules Wimbledon AC) | 52.5 | | | | | 4 | | A Wigley | (Mitcham AC) | 53.3 | | | | | 5 | | John Garber | (Croydon Harriers) | 59.6 | | | | |
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| Senior Men 400 Metres FINAL (Motspur Park, 19 May) | 1 | | Bolaji Odunsi | (Croydon Harriers) | 48.8 | | | | | 2 | | Paul Batten | | 48.9 | | | | | 3 | | J-P Fernee | (Epsom & Ewell Harriers) | 50.4 | | | | | 4 | | Maurice Evans | (Herne Hill Harriers) | 50.9 | | | | | 5 | | G Sagar | (Belgrave Harriers) | 51.1 | | | | | 6 | | C Knight | (Worth) | 51.6 | | | | |
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