| Senior Men 400 Metres HEAT 1 (Croydon Arena, 13 May) | 1 | | Dotun Akinbogun | (Belgrave Harriers) | 50.9 | | | | | 2 | | Mike Mason | (Sutton & District AC) | 51.5 | | | | | 3 | | Tony Mitchell | (Woking AC) | 51.9 | | | | | 4 | | Mark Butler | (Epsom & Ewell Harriers) | 53.5 | | | | | 5 | | David Spearman | (Croydon Harriers) | 54.5 | | | | |
| | | Senior Men 400 Metres HEAT 2 (Croydon Arena, 13 May) | 1 | | Richard David | (Belgrave Harriers) | 50.8 | | | | | 2 | | Stephen Vaughan | (Epsom & Ewell Harriers) | 51.0 | | | | | 3 | | Michael Cartal | (Herne Hill Harriers) | 51.6 | | | | | 4 | | Stefan Parocki | (Herne Hill Harriers) | 51.9 | | | | | 5 | | Adam Mustoe | (Walton AC) | 52.1 | | | | | 6 | | Robert Langridge | (Croydon Harriers) | 55.9 | | | | |
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