| Alastair Michael Deutsch | Director | 30 Jul 2018 | 6 Aug 2020 | British | 42 years |
| Andrew Elliott Macfarlane | Director | 2 Oct 2001 | 5 Aug 2005 | British | 69 years |
| Anthony Michael Chetwynd Dobbin | Director | 12 Jul 1991 | 1 Sept 2004 | British | 81 years |
| Christopher Marshall Gill | Director | 1 Sept 2004 | 14 Jul 2016 | British | 67 years |
| David Leslie Frank Holt | Director | 1 Sept 2004 | 30 Sept 2012 | United Kingdom | 67 years |
| Despina Don-wauchope | Director | 30 Sept 2012 | 31 Dec 2013 | British | 56 years |
| Don Eric Stanley | Director | 5 Aug 2022 | 13 Dec 2022 | British | 53 years |
| Ian James Henderson | Director | 12 Jul 1991 | 14 Jul 2004 | United Kingdom | 82 years |
| James Ian Keith Murray | Director | 12 Jul 1991 | 28 Jun 2001 | British | 79 years |
| James Stephen Gillard | Director | 30 Jun 2021 | 15 Jun 2022 | British | 48 years |
| Julie Louise Fountain | Director | 30 Jul 2018 | 18 Jan 2022 | New Zealander | 41 years |
| Laurance Aubrey Jones | Secretary | 12 Jul 1991 | 6 Apr 1998 | British | - |
| Marc Peter Cadwaladr | Director | 31 Dec 2013 | 28 Jun 2021 | British | 53 years |
| Martin Frederick Greenslade | Director | 6 Sept 2005 | 31 May 2021 | British | 60 years |
| Martin Lee | Director | 23 Sept 2004 | 26 Feb 2007 | British | 60 years |
| Martin Reay Wood | Director | 10 Dec 2002 | 30 Jun 2021 | British | 65 years |
| Nicholas Anthony Charles Moore | Director | 12 Jul 1991 | 20 Dec 2002 | British | 76 years |
| Peter John Hunt | Director | 12 Jul 1991 | 8 Dec 1997 | British | 92 years |
| Peter Maxwell Dudgeon | Secretary | 7 Apr 1998 | 30 Apr 2011 | British | - |
| Richard Spencer Bushell | Director | 10 Feb 2003 | 1 Sept 2004 | British | 70 years |
| Rosalind Charlotte Futter | Director | 30 Jul 2018 | 5 Aug 2022 | British | 47 years |
| Sean Allan West | Director | 1 Sept 2004 | 23 Feb 2012 | British,australian | 48 years |
| Stephen Sui Sang Leung | Director | 1 Sept 2004 | 14 Mar 2014 | British | 58 years |