| Alan Daniel Mclean | Director | 1 Sept 2008 | 1 May 2019 | British | 60 years |
| Alison Ayodele Henwood | Director | 17 Feb 2017 | 20 Apr 2022 | British | 61 years |
| Andrew Philip Roberts | Director | 1 May 2010 | 14 Dec 2012 | British | 70 years |
| Andrew William Longden | Director | 3 Nov 2003 | 29 Apr 2015 | British | 69 years |
| Armand Jean Margrete Lumens | Director | 19 Feb 2014 | 6 Dec 2016 | Dutch | 58 years |
| Bernardus Cornelis Adriana Margriet Van Beurden | Director | 26 Nov 2007 | 12 May 2010 | Dutch | 68 years |
| Bjorn Alexander Fermin | Director | 3 Oct 2012 | 28 Feb 2014 | Dutch | 64 years |
| Carmine Falcone | Director | 16 Mar 1999 | 13 Aug 1999 | Canadian | 80 years |
| Catherine Leigh Tanna | Director | 19 Jun 2003 | 31 Mar 2004 | Australia | 65 years |
| Charles Hugh Easton Watson | Director | 26 Nov 2007 | 6 Jul 2009 | British | 72 years |
| David William Wells | Director | 11 Jul 2017 | 11 Jul 2017 | British | 66 years |
| Gary Philip Thomson | Secretary | 14 Sept 1998 | 1 Jan 1999 | British | - |
| Graeme Stewart Sutherland Sweeney | Director | 24 Oct 2002 | 6 Sept 2004 | Scottish | 74 years |
| Gregory Arthur Lewin | Director | 10 Mar 2000 | 4 Sept 2002 | Australian | 73 years |
| Grzegorz Lukasz Gut | Director | 1 Feb 2022 | 1 Oct 2025 | Polish | 48 years |
| Guy Evert Albert Outen | Director | 7 Oct 2009 | 11 May 2010 | British | 66 years |
| Harry Lyford Allan | Secretary | 1 Jan 1999 | 28 Feb 2011 | British | - |
| Jonathan Chadwick | Director | 29 Mar 2001 | 1 Jul 2002 | British | 69 years |
| Karel Kooijman | Director | 21 Oct 1998 | 30 Jun 2000 | Dutch | 85 years |
| Karl Michael O'callaghan | Director | 5 Apr 2004 | 27 Sept 2007 | Irish | 69 years |
| Mark Richard Williams | Director | 6 Sept 2004 | 1 Jul 2007 | United States Citizen | 75 years |
| Marvin Eugene Odum Iii | Director | 4 Jul 2002 | 9 Jul 2003 | American | 68 years |
| Michael Francis Conway | Director | 1 May 2010 | 2 May 2017 | Us Citizen | 70 years |
| Nigel Anthony Hobson | Director | 1 Oct 2020 | 31 Jul 2021 | British | 62 years |
| Patrick James Ellingsworth | Director | 27 Jul 2000 | 30 Jun 2008 | United States Citizen | 78 years |
| Paul David Skinner | Director | 21 Oct 1998 | 22 Dec 1999 | British | 82 years |
| Peter Robert Voser | Director | 27 Jun 2001 | 1 Apr 2002 | Swiss | 68 years |
| Philippa Alice May Bounds | Secretary | 18 Mar 2016 | 30 Jan 2018 | - | - |
| Ralph Neil Gaskell | Director | 7 Jul 2000 | 3 Nov 2003 | British | 78 years |
| Ronald Bruce Blakely | Director | 4 Jul 2002 | 1 Sept 2008 | Canadian | 78 years |
| Russell Leslie O'brien | Director | 28 Apr 2015 | 5 Jul 2021 | British | 52 years |
| Simon Ludgate | Secretary | 30 Jan 2018 | 1 Jan 2020 | - | - |
| Stephen Murley Garfield Hodge | Director | 14 Sept 1998 | 10 Jul 2000 | British | 84 years |
| Thomas Jeffrey Brandt | Secretary | 1 Mar 2011 | 18 Mar 2016 | - | - |
| Timothy Donald Ryan Morrison | Director | 2 Sept 2008 | 12 May 2010 | British | 73 years |
| William Adrian Loader | Director | 30 Jul 1999 | 15 Apr 2002 | British | 78 years |
