| Youths 400 Metres HEAT 1
(Croydon Arena, 24 April) | | 1 | | Michael Carlile | (Croydon Harriers) | 51.7 | | | | | | 2 | | John O'Shea | (Woking AC) | 55.4 | | | | | | 3 | | P Lalsing | (Epsom & Ewell Harriers) | 56.2 | | | | | | 4 | | J Day | (Redhill & Reigate AC) | 57.0 | | | | | | 5 | | James Percival | (Croydon Harriers) | 57.2 | | | | |
| | | Youths 400 Metres HEAT 2
(Croydon Arena, 24 April) | | 1 | | Dick Addison | (Belgrave Harriers) | 51.9 | | | | | | 2 | | A Moore | (Belgrave Harriers) | 53.9 | | | | | | 3 | | P Penfold | (Mitcham AC) | 54.5 | | | | | | 4 | | J Day | (Sutton & Cheam Harriers) | 55.1 | | | | | | 5 | | S Holmes | (Epsom & Ewell Harriers) | 56.4 | | | | | | 6 | | S Froud | (Woking AC) | 60.8 | | | | |
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| Youths 400 Metres HEAT 3
(Croydon Arena, 24 April) | | 1 | | Sean Richards | (Belgrave Harriers) | 53.9 | | | | | | 2 | | M Dann | (Garth School, Morden) | 54.1 | | | | | | 3 | | D Coen | (Epsom & Ewell Harriers) | 54.7 | | | | | | 4 | | John Booth | (Hercules Wimbledon AC) | 55.2 | | | | | | 5 | | P Harnett | (King Edward School, Witley) | 58.0 | | | | | | 6 | | A Brennan | (Mitcham AC) | 59.5 | | | | | | 7 | | M Forrester | (Sutton & Cheam Harriers) | 62.1 | | | | |
| | | Youths 400 Metres FINAL
(Croydon Arena, 24 April) | | 1 | | Dick Addison | (Belgrave Harriers) | 49.9 | | CBP | | | | 2 | | Michael Carlile | (Croydon Harriers) | 50.4 | | | | | | 3 | | John O'Shea | (Woking AC) | 52.0 | | | | | | 4 | | Sean Richards | (Belgrave Harriers) | 52.7 | | | | | | 5 | | M Dann | (Garth School, Morden) | 52.8 | | | | | | 6 | | A Moore | (Belgrave Harriers) | 55.0 | | | | |
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