| Youths 400 Metres HEAT 1
(Motspur Park, 29 April) | | 1 | | Jean-Paul Fernee | (Mitcham AC) | 52.8 | | | | | | 2 | | F Senior | (Hercules Wimbledon AC) | 54.2 | | | | | | 3 | | R Young | (Epsom & Ewell Harriers) | 54.9 | | | | | | 4 | | K D Green | (Hercules Wimbledon AC) | 55.9 | | | | | | 5 | | N Barker | (Dorking St Paul's AC) | 57.7 | | | | | | 6 | | A Regan | (Herne Hill Harriers) | 58.8 | | | | |
| | | Youths 400 Metres HEAT 2
(Motspur Park, 29 April) | | 1 | | David Cocks | (Croydon Harriers) | 52.8 | | | | | | 2 | | M Brockington | (Kent AC) | 55.3 | | | | | | 3 | | R Dehaney | (St Jos Coll) | 56.0 | | | | | | 4 | | J Millward | (Camberley & District AC) | 56.5 | | | | | | 5 | | I Howe | (Epsom & Ewell Harriers) | 57.3 | | | | | | 6 | | S Moore | (Surrey AC / Beverley Sch) | 59.3 | | | | |
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| Youths 400 Metres HEAT 3
(Motspur Park, 29 April) | | 1 | | Philip Norgate | (Epsom & Ewell Harriers) | 52.7 | | | | | | 2 | | P Crate | (Epsom & Ewell Harriers) | 54.0 | | | | | | 3 | | J Regan | (St Jos Coll) | 55.8 | | | | | | 4 | | J Reay | (Woking AC) | 58.4 | | | | | | 5 | | M Stephenson | (St Jos Coll) | 59.6 | | | | | | 6 | | L Francis | (Beverley School, New Malden) | 66.5 | | | | |
| | | Youths 400 Metres FINAL
(Motspur Park, 30 April) | | 1 | | Philip Norgate | (Epsom & Ewell Harriers) | 51.8 | | | | | | 2 | | David Cocks | (Croydon Harriers) | 52.2 | | | | | | 3 | | P Crate | (Epsom & Ewell Harriers) | 53.8 | | | | | | 4 | | R Young | (Epsom & Ewell Harriers) | 57.5 | | | | |
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