| Alan Gerald Joslin | Director | 5 Feb 2004 | 1 Jan 2006 | British | 68 years |
| Anthony Jessup | Director | 22 Aug 1991 | 19 Dec 1996 | British | 98 years |
| Beryl Whittaker | Secretary | 1 Jan 2015 | 18 Dec 2019 | - | - |
| Brian George Mccarthy | Director | 27 Jun 2001 | 30 Apr 2003 | British | 80 years |
| Charles Bennett Brown | Secretary | 4 Feb 1999 | 26 May 2000 | British | - |
| David Llewellyn | Director | 1 Jan 1996 | 24 Aug 1996 | British | 82 years |
| David Neil Macfarlane | Director | 16 Mar 1994 | 31 Dec 1994 | British | 90 years |
| Derek William Jenkins | Director | 4 Aug 1993 | 27 Jun 2001 | British | 92 years |
| Edwyn Graham Newson | Director | 1 Jan 1998 | 26 Nov 2003 | British | 93 years |
| Francisco Javier Garcia Ruiz De Morales | Director | 1 Jun 2013 | 1 Jun 2014 | Spanish | 58 years |
| Frank James Standish | Secretary | 26 May 2000 | 24 Mar 2003 | British | - |
| Guillermo Francisco Martinez Sans | Director | 10 Nov 2005 | 3 Apr 2006 | Spanish | 64 years |
| James Henry Arnold | Secretary | 4 Sept 2007 | 14 May 2008 | British | - |
| Jason Alexander Smalley | Director | 9 Jun 2016 | 16 Nov 2016 | British | 57 years |
| John Camden | Director | 22 Aug 1991 | 30 Apr 1993 | British | 101 years |
| John Charles Spencer Mott | Director | 16 Sept 1992 | 31 Dec 1996 | British | 100 years |
| John Wilson Gauntlett | Director | 22 Aug 1991 | 10 Feb 1995 | British | 112 years |
| Jose Manuel Cascajero Rodriguez | Director | 17 Jan 2007 | 1 Jun 2013 | Spanish | 50 years |
| Julia Sharp | Secretary | 31 Mar 1994 | 4 Feb 1999 | British | - |
| Julia Sharp | Secretary | 14 May 2008 | 1 Jan 2015 | British | - |
| Leslie Fletcher | Director | 22 Aug 1991 | 27 Nov 1997 | British | 104 years |
| Michael David Hampson | Director | 1 Apr 1997 | 21 Sept 2004 | British | 68 years |
| Michael Jonathan Seaman | Director | 12 Mar 2008 | 30 Nov 2023 | British | 72 years |
| Michael Leslie Collins | Director | 21 Sept 2004 | 2 Apr 2015 | British | 70 years |
| Peter Hamilton Fulke Bullard | Director | 22 Aug 1991 | 29 Nov 2000 | British | 92 years |
| Peter Lance Young | Director | 29 Nov 2000 | 1 Jul 2006 | British | 88 years |
| Philip Brian Williams | Secretary | 22 Aug 1991 | 31 Mar 1994 | British | - |
| Richard Charles Burdon | Director | 3 Apr 2006 | 12 Mar 2008 | British | 62 years |
| Robert Ernest Lambourne | Director | 1 Jan 1998 | 27 Jun 2001 | British | 74 years |
| Robert Gerhard Janta-lipinski | Director | 23 Sept 2003 | 1 Mar 2005 | British | 74 years |
| Roger Martin Gonzalez Lau | Director | 1 Mar 2005 | 10 Nov 2005 | Nicaraguan | 59 years |
| Stephen David Walkland | Secretary | 19 May 2005 | 4 Sept 2007 | British | - |
| Tiffany Fern Brill | Secretary | 24 Mar 2003 | 19 May 2005 | British | - |