| Junior Men 400 Metres HEAT 1 (Motspur Park, 10 May) | 1 | | David Mote | (Surrey AC) | 51.5 | | | Q | | 2 | | P Crate | (Epsom & Ewell Harriers) | 52.2 | | | Q | | 3 | | D Hollands | (Dorking St Paul's AC) | 52.2 | | | | | 4 | | Wayne Abrehart | (Mitcham AC) | 53.3 | | | | | 5 | | A Nicholson | (Epsom & Ewell Harriers) | 53.4 | | | | |
| | | Junior Men 400 Metres HEAT 2 (Motspur Park, 10 May) | 1 | | M Cropper | (Bracknell AC) | 50.7 | | | Q | | 2 | | Jean-Paul Fernee | (Mitcham AC) | 51.3 | | | Q | | 3 | | Stuart Rough | (Epsom & Ewell Harriers) | 51.7 | | | | | 4 | | Robert Young | (Woking AC) | 54.2 | | | | | 5 | | P Young | (Hercules Wimbledon AC / Emanuel Sch) | 56.1 | | | | | 6 | | A Lowe | (Wallington Grammar School) | 56.6 | | | | |
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