| Alan John Neil Bray | Director | 29 Sept 2004 | 27 Feb 2014 | British | 81 years |
| Argeris Nicholas Karabelas | Director | 30 Nov 2000 | 15 May 2009 | American | 73 years |
| Axel Bernd Muller | Director | 23 Aug 2010 | 30 Jan 2012 | German | 68 years |
| David John Lees | Director | 10 Jan 1995 | 19 May 1999 | Australian | 78 years |
| David Philip Gordon | Director | 4 Jan 1992 | 31 Aug 1995 | British | 87 years |
| David Raymond Ebsworth | Director | 11 Apr 2002 | 29 Nov 2007 | British | 71 years |
| David Smith | Secretary | 29 Nov 1995 | 28 Feb 1996 | British | - |
| David Vernon Fox | Director | 4 Jan 1992 | 31 Aug 1995 | British | 71 years |
| David Vernon Fox | Secretary | 4 Jan 1992 | 25 Oct 1994 | British | - |
| Donald Nicholson | Director | 24 Mar 1997 | 14 Nov 2006 | British | 68 years |
| Douglas William Parkhill | Secretary | 25 Oct 1994 | 29 Nov 1995 | British | - |
| Douglas William Parkhill | Secretary | 16 Sept 2002 | 30 Sept 2006 | British | - |
| Elizabeth Teresa Knowles | Director | 31 Mar 2022 | 31 Jul 2023 | British | 41 years |
| Ernst Gutzwiller | Director | 3 May 1996 | 24 Mar 1997 | Swiss | 82 years |
| Frank Charles Condella | Director | 4 Apr 2006 | 17 Nov 2016 | American | 71 years |
| Ian Roderick Gowrie-smith | Director | 10 Jan 1995 | 13 Feb 2006 | British,australian | 77 years |
| Jacques Gonella | Director | 3 May 1996 | 6 Jun 2001 | Swiss | 84 years |
| James Alexander Ward-lilley | Director | 10 Jun 2016 | 30 Jun 2019 | British | 60 years |
| Jean-charles Tschudin | Director | 1 Jul 2007 | 31 Dec 2015 | Swiss | 83 years |
| Jeremy Paul Scudamore | Director | 15 Oct 2007 | 31 Dec 2009 | British | 78 years |
| John Anthony Biles | Director | 5 Mar 2014 | 10 Jun 2016 | British | 78 years |
| John Murphy | Secretary | 2 Oct 2006 | 30 Jun 2025 | British | - |
| John Murphy | Director | 31 Jul 2018 | 5 Feb 2020 | British | 72 years |
| John Murphy | Director | 31 Mar 2022 | 30 Jun 2025 | British | 72 years |
| Joseph Frank Bozman Jr | Director | 11 Aug 1995 | 31 Oct 1998 | American | 80 years |
| Keith Mansford | Director | 28 Feb 1996 | 28 Jun 2006 | British | 93 years |
| Kenneth Thomas Cunningham | Director | 17 May 2006 | 30 Sept 2010 | British | 73 years |
| Mehul Andrew Derodra | Director | 25 Nov 2013 | 31 Jul 2018 | British | 59 years |
| Michael Gordon Beavis | Director | 4 Jan 1992 | 28 Jun 2006 | British | 96 years |
| Michael John Teacher | Director | 4 Jan 1992 | 10 Jan 1995 | British | 78 years |
| Michael Richard Dwyer Ashton | Director | 24 Mar 1997 | 28 Jun 2006 | Australian | 79 years |
| Nigel William Wray | Director | 11 Jan 1995 | 30 Nov 2000 | British | 77 years |
| Paul Andrew Fry | Director | 30 Jun 2019 | 31 Mar 2022 | British | 59 years |
| Peter Warburton | Secretary | 28 Feb 1996 | 7 Sept 1999 | British | - |
| Peter William Grant | Director | 14 Nov 2006 | 10 Jun 2016 | British | 70 years |
| Ralph Stephen Harris | Director | 9 Nov 1995 | 21 May 2008 | British | 83 years |
| Richard Alistair Balfour Stewart | Director | 21 Jun 1995 | 20 Nov 1998 | British | 67 years |
| Robert Henri Zimmer | Director | 3 May 1996 | 24 Mar 1997 | French | 78 years |
| Roger Warrington Taylor | Director | 4 Jan 1992 | 21 Nov 1995 | British | 82 years |
| Suzanne Victoria Mclean | Secretary | 7 Sept 1999 | 10 Jul 2002 | British | - |
| Tamar D Howson | Director | 28 Sept 2000 | 26 Nov 2001 | Usa | 77 years |
| Thomas M Rinderknecht | Director | 7 May 1996 | 3 Nov 2000 | Swiss | 71 years |
| Thomas Werner | Director | 16 May 2009 | 17 Nov 2016 | German | 69 years |
| Torao Yamamoto | Director | 30 Oct 2002 | 18 Jul 2005 | Japanese | 83 years |
| Trevor Michael Phillips | Director | 17 Nov 2016 | 31 May 2017 | British | 64 years |
| Walter Zeller | Director | 28 Feb 1996 | 28 May 2003 | Swiss | 95 years |
| William Downie | Director | 5 Feb 2020 | 31 Mar 2022 | British | 58 years |