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| Boys 100 Metres HEAT 1 (Motspur Park, 12 May) | 1 | | D Broadwood | (Herne Hill Harriers) | 12.4 | | | Q | | 2 | | A Eden | (Beverley School, New Malden) | 13.2 | | | Q | | 3 | | Steven Fuller | (Woking AC) | 13.3 | | | Q | | 4 | | Richard Haizelden | (Sutton & Cheam Harriers) | 13.3 | | | | | 5 | | T A Butler | (Woking AC) | 13.6 | | | | | 6 | | K.Aris | (Redhill & Reigate AC) | 14.8 | | | | |
| | | Boys 100 Metres HEAT 2 (Motspur Park, 12 May) | 1 | | P H Hopkins | (Glebelands School, Cranleigh) | 12.6 | | | Q | | 2 | | Ashley Smith | (Croydon Harriers) | 12.8 | | | Q | | 3 | | M Abbott | (Redhill & Reigate AC) | 13.4 | | | Q | | 4 | | Peter Maloney | (St Josephs's College, Upper Norwood) | 13.5 | | | | | 5 | | P Burberry | (Redhill & Reigate AC) | 14.9 | | | | | 6 | | G Aylen | (Collingwood AC) | 15.5 | | | | |
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| Boys 100 Metres HEAT 3 (Motspur Park, 12 May) | 1 | | Alan Barber | (Croydon Harriers) | 12.7 | | | Q | | 2 | | L Broadwood | (Herne Hill Harriers) | 13.2 | | | Q | | 3 | | R H O'Donnell | (Surrey AC) | 13.3 | | | Q | | 4 | | T Nicolle | (Kings College School, Wimbledon) | 13.5 | | | | | 5 | | P Fiddemore | (Collingwood AC) | 13.5 | | | | | 6 | | P Mattingley | (Surrey AC) | 14.8 | | | | |
| | | Boys 100 Metres HEAT 4 (Motspur Park, 12 May) | 1 | | A James | (Epsom & Ewell Harriers) | 12.9 | | | Q | | 2 | | I G Fowler | (Hercules Wimbledon AC) | 13.1 | | | Q | | 3 | | M Branch | (Epsom & Ewell Harriers) | 13.2 | | | Q | | 4 | | S Boyce | (Epsom & Ewell Harriers) | 13.5 | | | | | 5 | | A W Speirs | (Kings College School, Wimbledon) | 14.0 | | | | | 6 | | I Dunnell | (Sutton & Cheam Harriers) | 14.2 | | | | |
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| Boys 100 Metres S-FINAL 1 (Motspur Park, 12 May) | 1 | | D Broadwood | (Herne Hill Harriers) | 12.5 | | | Q | | 2 | | Alan Barber | (Croydon Harriers) | 12.5 | | | Q | | 3 | | Ashley Smith | (Croydon Harriers) | 13.1 | | | Q | | 4 | | A Eden | (Beverley School, New Malden) | 13.3 | | | | | 5 | | M Branch | (Epsom & Ewell Harriers) | 13.4 | | | | | 6 | | R H O'Donnell | (Surrey AC) | 13.5 | | | | |
| | | Boys 100 Metres S-FINAL 2 (Motspur Park, 12 May) | 1 | | A James | (Epsom & Ewell Harriers) | 12.9 | | | Q | | 2 | | P H Hopkins | (Glebelands School, Cranleigh) | 12.9 | | | Q | | 3 | | L Broadwood | (Herne Hill Harriers) | 13.1 | | | Q | | 4 | | I G Fowler | (Hercules Wimbledon AC) | 13.1 | | | | | 5 | | Steven Fuller | (Woking AC) | 13.6 | | | | | 6 | | M Abbott | (Redhill & Reigate AC) | 13.7 | | | | |
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| Boys 100 Metres FINAL (Motspur Park, 12 May) | 1 | | D Broadwood | (Herne Hill Harriers) | 12.4 | | | | | 2 | | Alan Barber | (Croydon Harriers) | 12.4 | | | | | 3 | | A James | (Epsom & Ewell Harriers) | 12.7 | | | | | 4 | | T Hopkins | (Glebelands School, Cranleigh) | 13.0 | | | | | 5 | | Ashley Smith | (Croydon Harriers) | 13.1 | | | | | 6 | | L Broadwood | (Herne Hill Harriers) | 13.3 | | | | |
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