| Barry Peter Perrin | Director | 3 Aug 1998 | 19 Oct 2001 | British | 63 years |
| Bernard John Wiley | Director | 18 Oct 1995 | 9 May 1997 | British | 81 years |
| Christopher John Marsden | Director | 29 Mar 1991 | 14 Jun 1993 | British | 74 years |
| David Andrew Bruce | Director | 23 Jun 2011 | 10 Jul 2017 | British | 55 years |
| David Lynn Rhys Harris | Director | 28 Sept 1994 | 31 Dec 1997 | British | 84 years |
| Derek Bernard Fawcett | Director | 29 Mar 1991 | 31 Aug 1991 | British | 97 years |
| Douglas Watt Kilpatrick | Director | 14 Jun 1993 | 19 Oct 1995 | British | 90 years |
| Francis Declan Finbar Tempany Mccormack | Director | 19 Oct 1995 | 22 May 2009 | British | 71 years |
| Franklin Hill | Director | 1 Aug 1991 | 14 Jun 1993 | British | 79 years |
| Ian James Currie | Director | 10 Jul 2017 | 29 Feb 2024 | British | 64 years |
| James Leonard Holland | Director | 28 Sept 1994 | 19 Oct 1995 | British | 88 years |
| Julie Margaret Clare Clarke | Secretary | 19 Oct 2001 | 22 Mar 2004 | British | - |
| Kathryn Anne Busman | Director | 22 Mar 2004 | 13 Jun 2011 | British | 76 years |
| Mark Richard Johnson | Director | 19 Oct 2001 | 22 Mar 2004 | British | 65 years |
| Mathew Robert Duncan | Director | 1 Jul 2008 | 22 Nov 2010 | Australian | 64 years |
| Michael Jeremy Sparrow | Director | 4 Jan 2010 | 31 Dec 2013 | British | 65 years |
| Michael John Colin Milton | Director | 14 Jun 1993 | 28 Sept 1994 | British | 87 years |
| Michael John Colin Milton | Secretary | 29 Mar 1991 | 25 Sept 1995 | British | - |
| Michael Kane Dallas | Secretary | 15 Sept 2015 | 2 Jan 2019 | - | - |
| Neil Robert Ernest Kirkby | Director | 22 Jan 2013 | 12 Oct 2016 | British | 62 years |
| Nicholas James Wargent | Secretary | 25 Apr 2012 | 24 Apr 2015 | - | - |
| Nigel Carl Butters | Director | 29 Mar 1991 | 30 Apr 1991 | British | 83 years |
| Nikolas William Weston | Secretary | 25 Sept 1995 | 19 Oct 2001 | British | - |
| Philip Brookes | Director | 1 Jul 2008 | 31 Dec 2009 | British | 67 years |
| Robert Ian Maclean | Director | 19 Oct 2001 | 1 Jul 2008 | British | 67 years |
| Simon John Pankhurst | Director | 19 Oct 2001 | 4 Jan 2013 | Uk | 67 years |
| Stanley Adrian Sellers | Director | 19 Dec 1997 | 23 Apr 2001 | British | 77 years |
| Stuart James Siddall | Director | 28 Sept 1994 | 30 Apr 1995 | British | 73 years |
| Thomas John James | Secretary | 22 Mar 2004 | 25 Apr 2012 | British | - |
| William Alexander Latto | Director | 29 Mar 1991 | 14 Jun 1993 | British | 82 years |