| Alan John Bott | Director | 28 Mar 1994 | 25 Mar 1996 | British | 91 years |
| Austin Ballingall | Director | 7 Mar 1994 | 31 Aug 2014 | British | 76 years |
| Bruce Leonard Archer Dawes | Director | 16 Apr 1991 | 31 Mar 1998 | British | 84 years |
| Geoffrey Hansford-adams | Director | 30 Jun 2008 | 19 Jun 2012 | British | 78 years |
| Heather Mcguire | Director | 5 May 2000 | 11 Sept 2008 | British | 68 years |
| Ian James Thomas Warwick | Director | 16 Apr 1991 | 28 Feb 2003 | British | 81 years |
| Ian Michael Barnett | Director | 12 Jan 2004 | 17 Jul 2007 | British | 53 years |
| Jacqueline Gay Berry | Director | 20 Jun 2012 | 31 Dec 2015 | American | 74 years |
| James Constantine Stuart Mcclean | Director | 26 May 1994 | 5 May 2000 | British | 67 years |
| Jeremy James Lennox Rickcord | Director | 1 Apr 1998 | 19 Dec 2003 | British | 75 years |
| John Laurence Gorman | Director | 16 Jan 2018 | 2 Mar 2020 | British | 60 years |
| Jonathan Michael Mcgurk | Secretary | 31 Mar 2000 | 31 Jul 2004 | British | - |
| Lawrence Smith | Director | 20 Aug 1998 | 9 Dec 2002 | British | 58 years |
| Maurice William Winn | Director | 13 Jun 1991 | 30 Nov 2004 | British | 78 years |
| Michael Andrew Gibson | Director | 31 Mar 2000 | 27 Aug 2002 | British | 71 years |
| Michael Andrew Gibson | Director | 19 Dec 2003 | 12 May 2021 | British | 71 years |
| Michael Anthony Perrier Cattell | Director | 16 Apr 1991 | 31 Mar 2000 | British | 87 years |
| Michael Anthony Perrier Cattell | Secretary | 16 Apr 1991 | 31 Mar 2000 | British | - |
| Michael Daniel Frank Jerram | Director | 7 Mar 1994 | 9 Jun 2003 | British | 77 years |
| Michael Edward Phillips | Director | 13 Jun 1991 | 25 Aug 1993 | British | 77 years |
| Mohammad Ebrahim Ali Alhashimy | Director | 12 Apr 2016 | 15 Jan 2019 | British | 41 years |
| Nicholas Antony West | Director | 19 Mar 2001 | 16 Aug 2006 | British | 61 years |
| Nicholas Lawrence Luff | Director | 12 Mar 1997 | 24 Aug 2000 | British | 59 years |
| Nicholas Paul Loader | Director | 14 Dec 2007 | 4 Apr 2017 | British | 64 years |
| Patrick William Walters | Director | 27 Aug 2002 | 28 Sept 2006 | British | 60 years |
| Patrick William Walters | Director | 26 Feb 1999 | 19 Mar 2001 | British | 60 years |
| Peter Arthur Walker | Director | 23 May 1996 | 15 Jan 1997 | British | 73 years |
| Peter Charles Barbier | Director | 16 Apr 1991 | 20 Jul 1993 | British | 75 years |
| Philip James Kenley | Secretary | 1 Jun 2007 | 1 Apr 2012 | British | - |
| Phillip Adrian Brock | Director | 7 Mar 1994 | 16 Jun 1995 | British | 76 years |
| Phillip Adrian Brock | Director | 1 Nov 1995 | 20 Apr 1998 | British | 76 years |
| Rachael De Souza | Secretary | 1 Aug 2004 | 23 Jun 2006 | British | - |
| Rachael De Souza | Secretary | 2 Apr 2012 | 29 Oct 2012 | - | - |
| Raymond Harold Swann | Director | 16 Apr 1991 | 25 Oct 2007 | British | 86 years |
| Rita Powell | Director | 16 Aug 2006 | 30 Jun 2008 | British | 74 years |
| Samantha Polly Dobell | Director | 21 Mar 2003 | 19 Sept 2003 | British | 54 years |
| Stella Bridget Chaplin | Secretary | 23 Jun 2006 | 1 Jun 2007 | British | - |
| Susan Glenys Garstone | Director | 1 Mar 2005 | 4 Dec 2007 | British | 81 years |
| Valerie Milne | Director | 12 Sept 2008 | 2 Nov 2015 | British | 69 years |