| Junior Men 400 Metres HEAT 1 (Motspur Park, 17 May) | 1 | | Tom Kane | (Epsom & Ewell Harriers) | 52.4 | | | | | 2 | | C Knight | (Worth) | 52.7 | | | | | 3 | | Ashley Smith | (Croydon Harriers) | 53.3 | | | | | 4 | | R Iles | (Sutton & Cheam Harriers) | 53.4 | | | | | 5 | | Peter Maloney | (Croydon Harriers) | 54.7 | | | | | 6 | | A Crawford | (Hercules Wimbledon AC) | 57.0 | | | | | 7 | | R Foot | (Hercules Wimbledon AC) | 58.0 | | | | |
| | | Junior Men 400 Metres HEAT 2 (Motspur Park, 17 May) | 1 | | Shaun Hannan | (Thomas More S) | 51.1 | | | | | 2 | | A Malcolm | (Hercules Wimbledon AC) | 51.8 | | | | | 3 | | A Vaughan | (Epsom & Ewell Harriers) | 52.7 | | | | | 4 | | A Hutchins | (Hercules Wimbledon AC) | 54.6 | | | | | 5 | | J Facer | (Hercules Wimbledon AC) | 54.9 | | | | | 6 | | J Wright | (King Edward School, Witley) | 56.2 | | | | |
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