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| Boys 400 Metres HEAT 1
(Wimbledon Park, 24 April) | | 1 | | Sean Richards | (Belgrave Harriers) | 60.7 | | | | | | 2 | | M Cartmell | (Walton AC) | 63.3 | | | | | | 3 | | P Bexley | (Hercules Wimbledon AC) | 63.8 | | | | | | 4 | | H Scanlon | (Sutton & Cheam Harriers) | 65.9 | | | | | | 5 | | T Richardson | (Waverley Harriers) | 67.8 | | | | | | 6 | | P Barry | (Mitcham AC) | 68.3 | | | | | | 7 | | J Barry | (Mitcham AC) | 70.0 | | | | |
| | | Boys 400 Metres HEAT 2
(Wimbledon Park, 24 April) | | 1 | | John Booth | (Hercules Wimbledon AC) | 58.7 | | | | | | 2 | | M Day | (Sutton & Cheam Harriers) | 59.9 | | | | | | 3 | | A Owens | (Mitcham AC) | 64.9 | | | | | | 4 | | Mark Sexton | (Surrey Beagles AC) | 65.2 | | | | | | 5 | | S Letkey | (Sutton & Cheam Harriers) | 65.5 | | | | | | 6 | | N Bellis | (Waverley Harriers) | 67.2 | | | | | | 7 | | R Singh | (Surrey AC) | 67.2 | | | | |
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| Boys 400 Metres HEAT 3
(Wimbledon Park, 24 April) | | 1 | | N Bajwa | (Beverley School, New Malden) | 58.7 | | | | | | 2 | | S Holmes | (Epsom & Ewell Harriers) | 61.1 | | | | | | 3 | | N Hourhan | (Woking AC) | 62.0 | | | | | | 4 | | David Haizelden | (Sutton & Cheam Harriers) | 62.2 | | | | | | 5 | | I Robinson | (Mitcham AC) | 65.9 | | | | | | 6 | | P Wooding | (Walton AC) | 66.5 | | | | |
| | | Boys 400 Metres HEAT 4
(Wimbledon Park, 24 April) | | 1 | | G White | (Kings College School, Wimbledon) | 58.7 | | | | | | 2 | | M Thomas | (Mitcham AC) | 59.3 | | | | | | 3 | | A Storey | (Mitcham AC) | 62.9 | | | | | | 4 | | C Bleasdale | (Guildford & Godalming AC) | 63.7 | | | | | | 5 | | C Gardner | (Surrey AC) | 64.0 | | | | | | 6 | | T Gravett | (Mitcham AC) | 68.1 | | | | |
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| Boys 400 Metres HEAT 5
(Wimbledon Park, 24 April) | | 1 | | R Collinson | (Epsom & Ewell Harriers) | 59.5 | | | | | | 2 | | A Andrews | (Woking AC) | 60.5 | | | | | | 3 | | M Mooney | (Walton AC) | 61.5 | | | | | | 4 | | C Spinley | (Kings College School, Wimbledon) | 63.4 | | | | | | 5 | | M Morley | (Hercules Wimbledon AC) | 63.7 | | | | |
| | | Boys 400 Metres FINAL
(Wimbledon Park, 24 April) | | 1 | | Sean Richards | (Belgrave Harriers) | 57.2 | | | | | | 2 | | John Booth | (Hercules Wimbledon AC) | 58.2 | | | | | | 3 | | N Bajwa | (Beverley School, New Malden) | 59.3 | | | | | | 4 | | M Thomas | (Mitcham AC) | 59.3 | | | | | | 5 | | R Collinson | (Epsom & Ewell Harriers) | 60.3 | | | | | | 6 | | G White | (Kings College School, Wimbledon) | 62.6 | | | | |
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