| Adrian Roger Wyatt | Director | 25 Apr 1997 | 25 May 2012 | British | 78 years |
| Alexandra Antonia Mackaness | Director | 28 Sept 1993 | 5 Jan 1996 | British | 66 years |
| Arianne Berina Neumark | Director | 10 Aug 1993 | 21 Jun 1994 | American | 65 years |
| Bibi Rahima Ally | Director | 11 Jun 1993 | 30 Jul 1993 | British | 66 years |
| Brian Collett | Secretary | 11 Jun 1993 | 30 Jul 1993 | British | - |
| Charlotte Ind Eastwood | Secretary | 23 Jul 2002 | 25 Oct 2004 | British | - |
| Christopher Mary Masterson | Director | 10 Aug 1993 | 25 Apr 1997 | British | 70 years |
| David Nicholas Gavaghan | Director | 10 May 2010 | 10 May 2010 | British | 67 years |
| David Nicholas Gavaghan | Director | 10 May 2010 | 16 Feb 2012 | British | 67 years |
| Edward Stratford Dugdale | Director | 25 Apr 1997 | 21 Dec 1998 | British | 67 years |
| Gail Robson Skeete | Secretary | 20 Oct 1999 | 30 May 2000 | British | - |
| Gordon Bloor | Director | 30 Jul 1993 | 25 Apr 1997 | British | 84 years |
| Grahame Anthony Raspin | Director | 21 Dec 1998 | 10 Oct 2003 | British | 71 years |
| James Robert Hamilton Stubber | Director | 14 Oct 2002 | 17 Feb 2006 | British | 72 years |
| Maxwell David Shaw James | Director | 30 Oct 2012 | 27 Jun 2016 | British | 59 years |
| Michael Edward Riley | Director | 13 Aug 2001 | 31 Jul 2002 | British | 66 years |
| Nicholas Simon Keith Shattock | Director | 25 Apr 1997 | 21 Dec 1998 | British | 67 years |
| Nicholas Simon Keith Shattock | Secretary | 25 Apr 1997 | 21 Dec 1998 | British | - |
| Nigel George Ellis | Director | 25 Apr 1997 | 4 Sept 2007 | British | 87 years |
| Nigel Justin Kempner | Director | 31 Mar 2015 | 19 Jul 2016 | British | 70 years |
| Paul Hughes | Director | 21 Dec 1998 | 31 Jan 2000 | British | 73 years |
| Paul Hughes | Secretary | 20 May 1997 | 31 Jan 2000 | British | - |
| Rebecca Jane Worthington | Director | 22 Aug 2001 | 31 Oct 2012 | British | 55 years |
| Rebecca Jane Worthington | Secretary | 21 Dec 1998 | 23 Jul 2002 | British | - |
| Richard Bryan Blaxland | Director | 10 Aug 1993 | 25 Apr 1997 | British | 97 years |
| Richard James Stearn | Director | 31 Oct 2012 | 31 Oct 2012 | British | 59 years |
| Richard James Stearn | Director | 31 Oct 2012 | 31 Mar 2015 | British | 58 years |
| Robin David Clement Arnold | Director | 20 Mar 2008 | 30 Sept 2013 | British | 76 years |
| Sandra Judith Odell | Secretary | 1 Jan 2013 | 5 Oct 2016 | - | - |
| Sarah Jane Rice | Secretary | 1 Nov 1994 | 25 Apr 1997 | British | - |
| Simon Geoffrey Carter | Director | 26 May 2015 | 13 Jan 2017 | British | 51 years |
| Susan Elizabeth Dixon | Secretary | 25 Oct 2004 | 1 Jan 2013 | British | - |
| Terence Philip Goddard | Director | 30 Jul 1993 | 10 Jan 1995 | British | 86 years |
| Terence Philip Goddard | Secretary | 30 Jul 1993 | 1 Nov 1994 | British | - |
| Tonianne Dwyer | Director | 30 Nov 2006 | 16 Apr 2010 | Australian | 64 years |