| Senior Men 400 Metres HEAT 1
(Motspur Park, 10 May) | | 1 | | Rod Milne | (Guildford & Godalming AC) | 48.9 | | | Q | | | 2 | | Allan Cord | (Herne Hill Harriers) | 51.5 | | | Q | | | 3 | | Jonathan Owen | (Hercules Wimbledon AC) | 52.2 | | | q | | | 4 | | P C Roach | (Wallington Grammar School) | 52.5 | | | q | | | 5 | | Alistair Johnson | (Surrey AC) | 52.8 | | | | | | 6 | | Reg Hopkins | (Belgrave Harriers) | 52.8 | | | | | | 7 | | Terry Knight | (Collingwood AC) | 56.9 | | | | |
| | | Senior Men 400 Metres HEAT 2
(Motspur Park, 10 May) | | 1 | | Mark Clark | (Guildford & Godalming AC) | 50.7 | | | Q | | | 2 | | Charlie Gillett | (Belgrave Harriers) | 52.5 | | | Q | | | 3 | | V Walker | (Surrey AC) | 53.1 | | | | | | 4 | | R Chapman | (South London Harriers) | 54.9 | | | | | | 5 | | D Whitehead | (Epsom & Ewell Harriers) | 55.5 | | | | | | 6 | | R Haire | (Woking AC) | 55.8 | | | | | | 7 | | D Moffatt | (Woking AC) | 58.5 | | | | |
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