| Senior Men 400 Metres HEAT 1
(Tooting Bec, 16 May) | | 1 | | A Vaughan | (Epsom & Ewell Harriers) | 51.2 | | | | | | 2 | | Bolaji Odunsi | (Croydon Harriers) | 51.8 | | | | | | 3 | | Patrick Lyttle | (Belgrave Harriers) | 52.3 | | | | | | 4 | | D Thorne | (Mitcham & Sutton AC) | 52.6 | | | | | | 5 | | G Sagar | (Belgrave Harriers) | 52.7 | | | | | | 6 | | A Wigley | (Mitcham & Sutton AC) | 55.7 | | | | | | 7 | | John Garber (M45) | (Croydon Harriers) | 59.0 | | | | |
| | | Senior Men 400 Metres HEAT 2
(Tooting Bec, 16 May) | | 1 | | L Massy | (Herne Hill Harriers) | 52.1 | | | | | | 2 | | M Dann | (Hercules Wimbledon AC) | 52.5 | | | | | | 3 | | J Cooper | (Kingston AC & Polytechnic Harriers) | 52.7 | | | | | | 4 | | N Branch | (Guildford & Godalming AC) | 53.0 | | | | | | 5 | | R Chapman | (South London Harriers) | 53.8 | | | | | | 6 | | M Chambers | (Surrey Beagles AC) | 56.1 | | | | |
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