| Senior Men 400 Metres HEAT 1 (Motspur Park, 13 May) | 1 | | Michael Alleyne (U23) | (Belgrave Harriers) | 51.1 | | | | | 2 | | Philip A Young | (Hercules Wimbledon AC) | 52.3 | | | | | 3 | | K Green | (Hercules Wimbledon AC) | 53.4 | | | | | 4 | | N Branch | (Guildford & Godalming AC) | 53.6 | | | | | 5 | | M Quinlan | (Mitcham & Sutton AC) | 56.6 | | | | |
| | | Senior Men 400 Metres HEAT 2 (Motspur Park, 13 May) | 1 | | Bolaji Odunsi | (Croydon Harriers) | 51.4 | | | | | 2 | | M Jackson | (S&E) | 51.4 | | | | | 3 | | A Vaughan | (Epsom & Ewell Harriers) | 54.2 | | | | | 4 | | M Johnson | (Hercules Wimbledon AC) | 54.8 | | | | | 5 | | M Leeson | (Hercules Wimbledon AC) | 55.4 | | | | | 6 | | P Mills | (Epsom & Ewell Harriers) | 56.5 | | | | |
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