| Senior Men 400 Metres HEAT 1
(Motspur Park, 9 May) | | 1 | | M Clarke | (Guildford & Godalming AC) | 50.8 | | | | | | 2 | | D Anderson | (London AC) | 50.8 | | | | | | 3 | | Jonathan Owen | (Hercules Wimbledon AC) | 52.6 | | | | | | 4 | | R Chapman | (South London Harriers) | 53.7 | | | | | | 5 | | P Parish | (Herne Hill Harriers) | 54.0 | | | | | | 6 | | J O'Sullivan | (Herne Hill Harriers) | 58.1 | | | | |
| | | Senior Men 400 Metres HEAT 2
(Motspur Park, 9 May) | | 1 | | Rod Milne | (Guildford & Godalming AC) | 49.9 | | | | | | 2 | | Brian Dickens | (Herne Hill Harriers) | 50.5 | | | | | | 3 | | D Whitehead | (Epsom & Ewell Harriers) | 54.4 | | | | | | 4 | | J Nichols | (Sutton & Cheam Harriers) | 54.7 | | | | | | 5 | | Nigel Jackman | (Sutton & Cheam Harriers) | 54.7 | | | | | | 6 | | P Munn | (Mitcham AC) | 55.8 | | | | |
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| Senior Men 400 Metres HEAT 3
(Motspur Park, 9 May) | | 1 | | D Cleary | (Mitcham AC) | 53.5 | | | | | | 2 | | A Wigley | (Mitcham AC) | 54.5 | | | | | | 3 | | F Pereira | (South London Harriers) | 54.8 | | | | | | 4 | | J Augustine | (South London Harriers) | 54.8 | | | | | | 5 | | Tony Farrell | (Surrey Beagles AC) | 55.3 | | | | | | 6 | | T Knight | (Collingwood AC) | 56.9 | | | | |
| | | Senior Men 400 Metres FINAL
(Motspur Park, 13 May) | | 1 | | Rod Milne | (Guildford & Godalming AC) | 48.7 | | | | | | 2 | | M Clarke | (Guildford & Godalming AC) | 49.5 | | | | | | 3 | | Brian Dickens | (Herne Hill Harriers) | 50.0 | | | | | | 4 | | D Anderson | (London AC) | 50.6 | | | | | | 5 | | Jonathan Owen | (Hercules Wimbledon AC) | 52.2 | | | | | | 6 | | D Cleary | (Mitcham AC) | 52.2 | | | | | | 7 | | A Wigley | (Mitcham AC) | 53.2 | | | | |
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