| Junior Men | Hammer 12lb | 3 June 1950 | Motspur Park |
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97ft 7in (29.74m) | CBP | I A Inskip | (Walton AC) |
| Junior Men | Hammer 12lb | 2 June 1951 | Motspur Park |
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102ft 6½in (31.25m) | | R A Cawsey | (Walton AC) |
| Junior Men | Hammer 12lb | 17 May 1952 | Motspur Park |
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127ft 4in (38.81m) | CBP | M J Martin | (John Fisher School, Purley) |
| Junior Men | Hammer 12lb | 27 June 1953 | Wimbledon Park |
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127ft 7½in (38.90m) | CBP | W D'Hondt | (John Fisher School, Purley) |
| Junior Men | Hammer 12lb | 22 May 1954 | Motspur Park |
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127ft 11in (38.98m) | | P J Strickland | (John Fisher School, Purley) |
| Junior Men | Hammer 12lb | 02 June 1956 | Motspur Park |
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127ft 5in (38.83m) | | Laurenzio Rigamonti | (John Fisher School, Purley) |
| Junior Men | Hammer 12lb | 1 June 1957 | Motspur Park |
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127ft 5in (38.83m) | CBP | John Webster | (John Fisher School, Purley) |
| Junior Men | Hammer 12lb | 31 May 1958 | Motspur Park |
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127ft 2in (38.76m) | | John Webster | (John Fisher School, Purley) |
| Junior Men | Hammer 12lb | 30 May 1959 | Motspur Park |
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118ft 11in (36.24m) | | J Donaldson | (St Josephs's College, Upper Norwood) |
| Junior Men | Hammer 12lb | 28 May 1960 | Motspur Park |
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127ft 11in (38.98m) | | Neil Magee | (John Fisher School, Purley) |
| Junior Men | Hammer 12lb | 3 June 1961 | Motspur Park |
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127ft 11½in (39.00m) | | Neil Magee | (John Fisher School, Purley) |
| Junior Men | Hammer 12lb | 2 June 1962 | Motspur Park |
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127ft 3½in (38.79m) | | Chris Melluish | (St Josephs's College, Upper Norwood) |
| Junior Men | Hammer 12lb | 25 May 1963 | Motspur Park |
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127ft 1in (38.73m) | | Chris Melluish | (St Joseph's Col) |
| Junior Men | Hammer 12lb | 30 May 1964 | Motspur Park |
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127ft 9½in (38.95m) | | Ken Prior | (Epsom & Ewell Harriers) |
| Junior Men | Hammer 12lb | 29 May 1965 | Motspur Park |
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127ft 11in (38.98m) | | Bill Bardelang | (Croydon Harriers) |
| Junior Men | Hammer 12lb | 21 May 1966 | Motspur Park |
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127ft 6in (38.86m) | | Bill Bardelang | (Croydon Harriers) |
| Junior Men | Hammer 12lb | 20 May 1967 | Motspur Park |
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127ft 4in (38.81m) | | K Walmsley | (Surrey AC) |
| Junior Men | Hammer 12lb | 8 June 1968 | Motspur Park |
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109ft 6in (33.37m) | | N Evans | (Croydon Harriers) |
| Junior Men | Hammer 12lb | 7 June 1969 | Motspur Park |
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127ft 4in (38.81m) | | B Stahelin | (Ottershaw School, nr. Chertsey) |
| Junior Men | Hammer 12lb | 30 May 1970 | Motspur Park | 43.50m | | Chris King | (Croydon Harriers) |
| Junior Men | Hammer 6.25 | 19 May 1973 | Motspur Park | 33.60m | | H Curtis | (Sutton & Cheam Harriers) |
| Junior Men | Hammer 6.25 | 18 May 1974 | Motspur Park | 35.06m | | K Curtis | (Sutton & Cheam Harriers) |
| Junior Men | Hammer 6.25 | 7 June 1975 | Motspur Park | 48.76m | | R Williamson | (Shaftesbury Harriers) |
| Junior Men | Hammer 6.25 | 15 May 1976 | Motspur Park | 42.74m | | Steve Sage | (Epsom & Ewell Harriers) |
| Junior Men | Hammer 6.25 | 14 May 1977 | Motspur Park | 47.80m | | Steve Sage | (Epsom & Ewell Harriers) |
| Junior Men | Hammer 6.25 | 13 May 1978 | Motspur Park | 32.82m | | K D Green | (Surrey AC) |
| Junior Men | Hammer 6.25 | 12 May 1979 | Motspur Park | 44.34m | | Nigel Bird | (Surrey Beagles AC) |
| Junior Men | Hammer 6.25 | 17 May 1980 | Motspur Park | 47.14m | | Nigel Bird | (Surrey Beagles AC) |
| Junior Men | Hammer 6.25 | 16 May 1981 | Motspur Park | 36.92m | | M Blows | (Surrey Beagles AC) |
| Junior Men | Hammer 6.25 | 15 May 1982 | Motspur Park | 44.52m | | Christopher Smale | (Sutton & Cheam Harriers) |
| Junior Men | Hammer 6.25 | 21 May 1983 | Motspur Park | 49.58m | | Christopher Smale | (Sutton & Cheam Harriers) |
| Junior Men | Hammer 6.25 | 19 May 1984 | Motspur Park | 53.62m | CBP | Christopher Smale | (Sutton & Cheam Harriers) |
| Junior Men | Hammer 6.25 | 18 May 1985 | Motspur Park | 57.10m | CBP | Gareth Cook | (Sutton & Cheam Harriers) |
| Junior Men | Hammer 6.25 | 17 May 1986 | Motspur Park | 61.54m | CBP | Gareth Cook | (Mitcham & Sutton AC) |
| Junior Men | Hammer 6.25 | 16 May 1987 | Tooting Bec | 65.04m | CBP | Gareth Cook | (West London Hammer School) |
| Junior Men | Hammer 6.25 | 14 May 1988 | Tooting Bec | 68.44m | CBP | Gareth Cook | (West London Hammer School) |
| Junior Men | Hammer 6.25 | 20 May 1989 | Tooting Bec | 43.94m | | Scott Hipkiss | (Mitcham & Sutton AC) |
| Junior Men | Hammer 6.25 | 19 May 1990 | Croydon Arena | 39.82m | | M Purnell | (Royal Grammar School, Guildford) |
| Junior Men | Hammer 6.25 | 16 May 1992 | Croydon Arena | 25.34m | | D Wyard | (Epsom & Ewell Harriers) |
| Under-20 Men | Hammer 6.25 | 1 May 1993 | Wimbledon Park | 49.62m | | Robert Snow | (Guildford & Godalming AC) |
| Under-20 Men | Hammer 6.25 | 14 May 1994 | Croydon Arena | 54.64m | | Bill Fuller | (Sutton & District AC) |
| Under-20 Men | Hammer 6.25 | 29 April 1995 | Wimbledon Park | 55.82m | | Bill Fuller | (Epsom & Ewell Harriers) |
| Under-20 Men | Hammer 6.25 | 12 May 1996 | Croydon Arena | 44.44m | | Peter Fuller | (Epsom & Ewell Harriers) |
| Under-20 Men | Hammer 6.25 | 10 May 1997 | Wimbledon Park | 50.52m | | Peter Fuller | (Epsom & Ewell Harriers) |
| Under-20 Men | Hammer 6.25 | 10 May 1998 | Kingsmeadow Stadium | 46.71m | | Stephen Thompson | ((St Marys U)) |
| Under-20 Men | Hammer 6.25 | 9 May 1999 | Kingsmeadow Stadium | 55.65m | | Timmon Whitehead | (Guildford & Godalming AC) |
| Under-20 Men | Hammer 6.25 | 14 May 2000 | Croydon Arena | 53.46m | | Timmon Whitehead | (Guildford & Godalming AC) |
| Under-20 Men | Hammer 6.25 | 11 May 2002 | Kingsmeadow Stadium | 39.75m | | Kyle Stevens | (Kingston AC & Polytechnic Harriers) |
| Under-20 Men | Hammer 6kg | 10 May 2003 | Kingsmeadow Stadium | 51.16m | | Kyle Stevens | (Kingston AC & Polytechnic Harriers) |
| Under-20 Men | Hammer 6kg | 15 May 2004 | Kingsmeadow Stadium | 53.04m | | Mark Covington | (Guildford & Godalming AC) |
| Under-20 Men | Hammer 6kg | 14 May 2005 | Kingsmeadow Stadium | 50.44m | | Chris Scott | (Guildford & Godalming AC) |
| Under-20 Men | Hammer 6kg | 13 May 2006 | Kingsmeadow Stadium | 54.69m | | Chris Scott | (Guildford & Godalming AC) |
| Under-20 Men | Hammer 6.25 | 12 May 2007 | Kingsmeadow Stadium | 50.69m | | Kaine Harrington | (Crawley AC) |
| Under-20 Men | Hammer 6kg | 9 May 2009 | Kingsmeadow Stadium | 32.79m | | Nathan Featherstone | (Epsom & Ewell Harriers) |
| Under-20 Men | Hammer 6kg | 8 May 2010 | Kingsmeadow Stadium | 39.21m | | Nathan Featherstone | (Epsom & Ewell Harriers) |
| Under-20 Men | Hammer 6kg | 25 May 2013 | Kingsmeadow Stadium | 44.73m | | Curtis Knight | (Walton AC) |
| Under-20 Men | Hammer 6kg | 24 May 2014 | Kingsmeadow Stadium | 50.10m | | Curtis Knight | (Walton AC) |
| Under-20 Men | Hammer 6kg | 23 May 2015 | Kingsmeadow Stadium | 54.93m | | Munroe Ritchie | (Crawley AC) |
| Under-20 Men | Hammer 6kg | 14 May 2016 | Kingsmeadow Stadium | 55.90m | | Peter Cassidy | (Guildford & Godalming AC) |
| Under-20 Men | Hammer 6kg | 13 May 2017 | Kingsmeadow Stadium | 59.83m | | Peter Cassidy | (Guildford & Godalming AC) |
| Under-20 Men | Hammer 6kg | 12 May 2018 | Kingsmeadow Stadium | 59.82m | | Sam Mace | (Walton AC) |
| Under-20 Men | Hammer 6kg | 11 May 2019 | Kingsmeadow Stadium | 64.17m | CBP & Sy Record | Sam Mace | (Walton AC) |
| Under-20 Men | Hammer 6kg | 31 July 2021 | Kingsmeadow Stadium | 46.45m | | Joshua Cowie | (Walton AC) |
| Under-20 Men | Hammer 6kg | 14 May 2022 | Kingsmeadow Stadium | 49.84m | | Anton Joseph | (Guildford & Godalming AC) |
