Under-20 Women | 400m | 16 May 1993 | Croydon Arena | 56.5 | CBP | Diana Bennett | (Epsom & Ewell Harriers) |
Under-20 Women | 400m | 15 May 1994 | Croydon Arena | 57.5 | | Elizabeth Williams | (Walton AC) |
Under-20 Women | 400m | 13 May 1995 | Croydon Arena | 58.0 | | Elizabeth Williams | (Walton AC) |
Under-20 Women | 400m | 11 May 1996 | Croydon Arena | 57.5 | | Elizabeth Williams | (Walton AC) |
Under-20 Women | 400m | 10 May 1997 | Wimbledon Park | 56.3 | CBP | Claire Nichols | (Woking AC) |
Under-20 Women | 400m | 9 May 1998 | Kingsmeadow Stadium | 60.7 | | Kemila Brathwaite | (Croydon Harriers) |
Under-20 Women | 400m | 9 May 1999 | Kingsmeadow Stadium | 57.8 | | Susan Bovill | (Sutton & District AC) |
Under-20 Women | 400m | 14 May 2000 | Croydon Arena | 58.8 | | Susan Bovill | (Sutton & District AC) |
Under-20 Women | 400m | 13 May 2001 | Kingsmeadow Stadium | 57.9 | | Susan Bovill | (Sutton & District AC) |
Under-20 Women | 400m | 12 May 2002 | Kingsmeadow Stadium | 58.39 | | Sophie Douglas | (Guildford & Godalming AC) |
Under-20 Women | 400m | 11 May 2003 | Kingsmeadow Stadium | 57.2 | | Lauren Webb | (Sutton & District AC) |
Under-20 Women | 400m | 16 May 2004 | Kingsmeadow Stadium | 57.79 | | Lauren Webb | (Sutton & District AC) |
Under-20 Women | 400m | 15 May 2005 | Kingsmeadow Stadium | 57.59 | | Hannah Brooks | (Crawley AC) |
Under-20 Women | 400m | 14 May 2006 | Kingsmeadow Stadium | 58.04 | | Sarah Harris | (Kingston AC & Polytechnic Harriers) |
Under-20 Women | 400m | 13 May 2007 | Kingsmeadow Stadium | 58.82 | | Odette Campbell | (Croydon Harriers) |
Under-20 Women | 400m | 11 May 2008 | Kingsmeadow Stadium | 57.27 | | Vickie Hewett | (Woking AC) |
Under-20 Women | 400m | 10 May 2009 | Kingsmeadow Stadium | 56.35 | | Victoria Hewett | (Woking AC) |
Under-20 Women | 400m | 9 May 2010 | Kingsmeadow Stadium | 55.41 | CBP | Twinelle Hopeson | (Croydon Harriers) |
Under-20 Women | 400m | 15 May 2011 | Kingsmeadow Stadium | 56.06 | | Yimika Adewakun | (Blackheath & Bromley Harriers AC) |
Under-20 Women | 400m | 13 May 2012 | Kingsmeadow Stadium | 56.0 | | Adelle Tracey | (Guildford & Godalming AC) |
Under-20 Women | 400m | 26 May 2013 | Kingsmeadow Stadium | 56.94 | | Megan Aitchison | (Aldershot, Farnham & District AC) |
Under-20 Women | 400m | 25 May 2014 | Kingsmeadow Stadium | 57.83 | | Matilda Rainsborough | (Guildford & Godalming AC) |
Under-20 Women | 400m | 24 May 2015 | Kingsmeadow Stadium | 56.36 | | Nicole Kendall | (Kingston AC & Polytechnic Harriers) |
Under-20 Women | 400m | 15 May 2016 | Kingsmeadow Stadium | 59.8 | | Hannah Knights | (Guildford & Godalming AC) |
Under-20 Women | 400m | 14 May 2017 | Kingsmeadow Stadium | 56.74 | | Ellie Grove | (Guildford & Godalming AC) |
Under-20 Women | 400m | 13 May 2018 | Kingsmeadow Stadium | 56.84 | | Eleanor Grove | (Guildford & Godalming AC) |
Under-20 Women | 400m | 12 May 2019 | Kingsmeadow Stadium | 59.28 | | Louisa Stoney | (Kingston AC & Polytechnic Harriers) |
Under-20 Women | 400m | 1 August 2021 | Kingsmeadow Stadium | 60.73 | | Lucy Atkins | (Kingston AC & Polytechnic Harriers) |
Under-20 Women | 400m | 15 May 2022 | Kingsmeadow Stadium | 60.61 | | Milda Sileikaite | (Sutton & District AC) |
Under-20 Women | 400m | 14 May 2023 | Kingsmeadow Stadium | 56.70 | | Caitlyn Harvey | (Kingston AC & Polytechnic Harriers) |