(1) | 45.35 | Martyn Rooney | (Croydon Harriers) | Melbourne AUS | 21.03.2006 |
(2) | 46.54 | Michael Parper | (Belgrave Harriers) | Bad Homburg, GER | 7.06.1997 |
(3) | 46.56 | Roy Dickens | (Shaftesbury Harriers) | Crystal Palace | 6.09.1980 |
(4) | 47.22 | Ryan Thomas | (Belgrave Harriers) | Eton | 5.08.2006 |
(5) | 47.24 | James Hilston | (Belgrave Harriers) | Loughborough | 18.05.1997 |
(6) | 47.3 | David Simpson | (Croydon Harriers) | Colindale | 14.08.1991 |
(7) | 47.6 | Bob Benn | (Croydon Harriers) | Papendal, NED | 17.08.1974 |
(8) | 47.68 | Paul Harmsworth | (Walton AC) | Crystal Palace | 27.06.1982 |
(9) | 47.8 | David McKenzie | (Croydon Harriers) | Yeovil | 8.07.1988 |
(10) | 47.84 | Klaysen Kafuti | (Croydon Harriers) | Chelmsford | 18.06.2023 |
(11) | 47.85 | Louis Burgess | (Epsom & Ewell Harriers) | Ashford | 18.08.2002 |
(12) | 47.88 | Zak Curran | (Windsor, Slough, Eton & Hounslow AC) | Woking | 1.08.2012 |
(13) | 47.96 | Josh Street (U17) | (South London Harriers) | Birmingham | 10.07.2010 |
(14) | 48.0 | Martin Winbolt Lewis | (London AC) | White City, London | 14.08.1965 |
| 48.0 | Mark Clark | (Guildford & Godalming AC) | Woking | 20.07.1974 |
| 48.0 | Bolaji Odunsi | (Croydon Harriers) | Crystal Palace | 27.06.1982 |
(17) | 48.01 | Conor Kelly | (Hercules Wimbledon AC) | Lee Valley | 19.05.2024 |
(18) | 48.1 | Rod Milne | (Guildford & Godalming AC) | Aldershot | 30.06.1976 |
| 48.1 | Danny Doyley | (Blackheath & Bromley Harriers AC) | Eton | 13.08.2006 |
(20) | 48.2 | Jack Sam | (Herne Hill Harriers) | Crystal Palace | 20.09.1969 |
(21) | 48.24 | Darren Bernard | (Herne Hill Harriers) | Birmingham | 5.08.1988 |
(22) | 48.3 | Tim Eaton | (Mitcham & Sutton AC) | Croydon | 20.05.1990 |
(23) | 48.31 | Gavin Dublin | (Croydon Harriers) | Nottingham | 13.07.2002 |
| 48.31 | Lolu Oluwole-Ojo | (Windsor, Slough, Eton & Hounslow AC) | Oordegem, BEL | 1.06.2013 |
(25) | 48.4y | John Strachan | (Hercules AC) | Motspur Park | 30.05.1959 |
| 48.4 | Michael Riddell | (Guildford & Godalming AC) | Bracknell | 6.06.1998 |
(27) | 48.44 | Shaun Cooke | (Blackheath & Bromley Harriers AC) | Hendon | 23.08.2015 |
(28) | 48.49 | Jonathan Osbourne (U17) | (Hercules Wimbledon AC) | Bedford | 22.08.2010 |
(29) | 48.5 | David Cocks | (Croydon Harriers) | Crystal Palace | 21.06.1980 |
(30) | 48.51 | Tom Kane | (Epsom & Ewell Harriers) | Crystal Palace | 23.06.1985 |
(31) | 48.6y | Robin Woodland | (Hercules AC) | Hurlingham | 7.09.1957 |
| 48.6 | Nick Lovatt | (Mitcham AC) | White City, London | 14.08.1965 |
| 48.6 | Tony Martin | (Dulwich College) | Crystal Palace | 14.06.1969 |
| 48.6 | Martin Gaston | (Hercules Wimbledon AC) | Croydon | 20.05.1990 |
| 48.6 | Robert Scantlebury | (Hercules Wimbledon AC) | Reading | 2.07.1994 |
(36) | 48.61 | Frederick Afrifa | (Crawley AC) | Kingston | 23.05.2015 |
(37) | 48.66 | Omari Carr-Miller (U17) | (Croydon Harriers) | Bedford | 21.08.2011 |
(38) | 48.67 | Ocean Schwartz | (Holland Sports AC) | Bromley | 2.07.2016 |
(39) | 48.69 | Omar Parsons | (Shaftesbury Barnet Harriers) | Watford | 13.07.2016 |
(40) | 48.7 | Donovan Reid | (Shaftesbury Harriers) | Adelaide, AUS | 7.10.1981 |
| 48.7 | Richard David | (Belgrave Harriers) | Tooting Bec | 21.08.1996 |
(42) | 48.77 | Ade Odunsi | (Croydon Harriers) | Crystal Palace | 2.08.1989 |
(43) | 48.8y | Tony Collins | (Hercules AC) | Hurlingham | 1.07.1967 |
(44) | 48.85 | Owen Parker | (Herne Hill Harriers) | Brighton | 1.08.1981 |
(45) | 48.87 | Dedan Simmons | (Harrow AC) | Bedford | 29.06.2002 |
(46) | 48.88 | Joshua Pearson (U17) | (Windsor, Slough, Eton & Hounslow AC) | Reading | 29.04.2018 |
(47) | 48.89 | Gavin Mason | (Belgrave Harriers) | Lin. Christie | 2.07.1994 |
(48) | 48.9 | John Gladwin | (Belgrave Harriers) | Windsor | 5.06.1982 |
(49) | 49.0y | James Perriss | (Hercules AC) | Motspur Park | 3.06.1961 |
| 49.0 | David Mote | (Surrey AC) | Motspur Park | 14.05.1977 |
(51) | 49.09 | Samuel Mowa | (Blackheath & Bromley Harriers AC) | Kingston | 10.06.2023 |
(52) | 49.10 | Alex O'Callaghan-Brown | (Blackheath & Bromley Harriers AC) | Bromley | 22.08.2020 |
(53) | 49.11 | Jack Dickson | (Kingston AC & Polytechnic Harriers) | Kingston | 3.07.2021 |
(54) | 49.14 | Ricky Lutakome | (Sutton & District AC) | Bromley | 10.07.2017 |
(55) | 49.16 | Samuel Adeyemi | (Herne Hill Harriers) | Bromley | 4.07.2009 |
(56) | 49.18 | George Pittwood | (Walton AC) | Kingston | 11.05.2024 |
(57) | 49.2y | Henry Holland | (South London Harriers) | Motspur Park | 30.05.1959 |
| 49.2y | Jan Luitz | (Epsom Coll) | Blackburn | 9.07.1966 |
(59) | 49.21 | Sean Richards | (Herne Hill Harriers) | Crystal Palace | 23.06.1985 |
(60) | 49.24 | Edward Coats | (Guildford & Godalming AC) | Arles, FRA | 29.05.1999 |
(61) | 49.26 | Stefan Richards | (Epsom & Ewell Harriers) | Lee Valley | 17.07.2010 |
(62) | 49.29 | Ethan Curran | (Crawley AC) | Chelmsford | 17.06.2023 |
(63) | 49.3y | Roger Dollimore | (South London Harriers) | | 30.05.1962 |
(64) | 49.31 | Thomas Westerman | (Guildford & Godalming AC) | Kingston | 12.05.2018 |
(65) | 49.32 | Keeran Sriskandarajah | (Herne Hill Harriers) | Kingston | 11.05.2024 |
(66) | 49.34 | Dominique Richards | (Herne Hill Harriers) | Hendon | 24.08.1997 |
(67) | 49.4y | David Cocks | (Belgrave Harriers) | Wimbledon Park | 30.06.1962 |
| 49.4y | Christopher Marchese | (Surrey AC) | Motspur Park | 30.04.1966 |
| 49.4 | Steve White | (Belgrave Harriers) | Crystal Palace | 17.09.1969 |
| 49.4 | Patrick Johnson | (Herne Hill Harriers) | | 12.06.1971 |
(71) | 49.42 | Moyo Sankofa (U17) | (Herne Hill Harriers) | Watford | 25.05.2003 |
| 49.42 | Jacob Paul | (Windsor, Slough, Eton & Hounslow AC) | Bromley | 22.07.2012 |
(73) | 49.46 | Zachary Crowther | (Herne Hill Harriers) | Bromley | 21.05.2024 |
(74) | 49.5y | Michael Hazell | (Walton AC) | Camberley | 12.06.1965 |
| 49.5 | Jean-Paul Fernee (U17) | (Mitcham AC) | Crystal Palace | 16.07.1978 |
| 49.5 | N Knight | (Collingwood AC) | Brighton | 19.07.1981 |
| 49.5 | Romell Glave | (Croydon Harriers) | Croydon | 23.07.2017 |
(78) | 49.52 | Tim Kuria | (Woking AC) | Woking | 2.09.2007 |
(79) | 49.54 | Noah Ridgeon | (Belgrave Harriers) | Monaco, FRA | 17.04.2024 |
| 49.54 | Fred Hake (U17) | (Herne Hill Harriers) | Kingston | 12.05.2024 |
(81) | 49.6y | James Avis | (Deptford Park AC) | White City, London | 15.08.1959 |
| 49.6 | Tony Harris | (Mitcham AC) | White City, London | 13.08.1960 |
| 49.6y | Leslie Taylor | (Guildford & Godalming AC) | Hurlingham | 13.08.1966 |
| 49.6y | David Marchese | (Surrey AC) | Motspur Park | 10.06.1967 |
| 49.6y | Jim Vivian | (Belgrave Harriers) | Crystal Palace | 23.08.1967 |
| 49.6 | Stephen Mitchell (U17) | (Epsom & Ewell Harriers) | Croydon | 15.05.1994 |
| 49.6 | Derek Kinlock | (Croydon Harriers) | Croydon | 28.07.2019 |
(88) | 49.63 | Owen Heard | (Harrow AC) | Nuneaton | 30.08.2020 |
(89) | 49.64 | Henry Fisher | (Blackheath & Bromley Harriers AC) | Stratford (CT) | 13.06.2021 |
(90) | 49.7 | Martin Scott | (Belgrave Harriers) | Motspur Park | 18.05.1974 |
| 49.7 | Phil Norgate | (Epsom & Ewell Harriers) | Crystal Palace | 1.06.1980 |
| 49.7 | Tim Brennan | (Sutton & Cheam Harriers) | Cobham | 23.07.1980 |
| 49.70 | Lee McLaughlin (U17) | (Croydon Harriers) | Croydon | 20.05.2007 |
(94) | 49.71 | George Thatcher | (Croydon Harriers) | Kingston | 12.05.2007 |
(95) | 49.74 | Will Stapleton | (Kingston AC & Polytechnic Harriers) | Sportcity | 1.06.2019 |
(96) | 49.8 | Steve Moriarty | (Epsom & Ewell Harriers) | Motspur Park | 15.05.1976 |
| 49.8 | George Sarkodie | (Croydon Harriers) | Copthall | 5.07.1986 |
| 49.8 | Jason Davenhill | (Trinity School, Croydon) | Tooting Bec | 15.05.1988 |
| 49.8 | Andrew Watson | (Woking AC) | Woking | 18.08.2002 |
(100) | 49.81 | Nimi Kolade | (Hercules Wimbledon AC) | Tooting Bec | 10.08.2016 |
| 49.81 | Micah Francis-Dwyer | (Croydon Harriers) | Croydon | 28.05.2017 |
| 49.81 | Klaysen Brandao Kafuti (U17) | (Croydon Harriers) | Kingston | 11.06.2022 |
102 athletes with performances of 49.81 or better. |
Other marks |