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| Youths 400 Metres HEAT 1 (Croydon Arena, 28 April) | 1 | | H.Greenidge | (Mitcham AC) | 54.3 | | | | | 2 | | S.Frogley | (Haslemere Border AC) | 54.5 | | | | | 3 | | Anthony Tilney | (Epsom & Ewell Harriers) | 56.3 | | | | | 4 | | R.Bolton | (Woking AC) | 59.5 | | | | | 5 | | W.Davis | (King Edward School, Witley) | 68.4 | | | | |
| | | Youths 400 Metres HEAT 2 (Croydon Arena, 28 April) | 1 | | Paul Roberts | (Mitcham AC) | 53.8 | | | | | 2 | | D.Scott | (Epsom & Ewell Harriers) | 56.8 | | | | | 3 | | D.Kelley | (Herne Hill Harriers) | 58.8 | | | | | 4 | | R.Clasby | (Hercules Wimbledon AC) | 60.6 | | | | | 5 | | J.Randall | (RBK) | 61.6 | | | | |
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| Youths 400 Metres HEAT 3 (Croydon Arena, 28 April) | 1 | | G.Tiernan | (Belgrave Harriers) | 54.6 | | | | | 2 | | M.Scanlon | (Sutton & Cheam Harriers) | 51.9 | | | | | 3 | | S.Brett | (Epsom & Ewell Harriers) | 58.1 | | | | | 4 | | R.Phillips | (King Edward School, Witley) | 60.5 | | | | | 5 | | G.Baverstock | (RBK) | 61.5 | | | | |
| | | Youths 400 Metres HEAT 4 (Croydon Arena, 28 April) | 1 | | C.Bleasdale | (Guildford & Godalming AC) | 54.7 | | | | | 2 | | M.Stephens | (Guildford & Godalming AC) | 55.4 | | | | | 3 | | P.Grimes | (Woking AC) | 58.3 | | | | | 4 | | K.Ryan | (Dorking St Paul's AC) | 61.7 | | | | | 5 | | S.Davey | (Hercules Wimbledon AC) | 66.9 | | | | |
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| Youths 400 Metres FINAL (Croydon Arena, 28 April) | 1 | | Paul Roberts | (Mitcham AC) | 51.9 | | | | | 2 | | C.Bleasdale | (Guildford & Godalming AC) | 53.6 | | | | | 3 | | H.Greenidge | (Mitcham AC) | 54.0 | | | | | 4 | | G.Tiernan | (Belgrave Harriers) | 54.6 | | | | | 5 | | M.Scanlon | (Sutton & Cheam Harriers) | 54.9 | | | | | 6 | | S.Frogley | (Haslemere Border AC) | 55.0 | | | | |
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