| Andre Jacques Nel | Director | 3 Mar 2010 | 19 Feb 2013 | South African | 53 years |
| Anne Lucille Verrinder | Director | 29 Mar 2010 | 6 Jul 2017 | Uk | 54 years |
| Ben John Osborn | Director | 29 Apr 2019 | 28 Feb 2022 | British | 48 years |
| Benjamin James Michael Holgate | Director | 2 Oct 2001 | 5 Apr 2010 | British | 58 years |
| Benjamin James Michael Holgate | Secretary | 2 Oct 2001 | 1 Feb 2010 | British | - |
| Bernard Canavan | Director | 31 May 1992 | 31 Jan 1994 | Canadian Citizen | 89 years |
| Bernard Poussot | Director | 31 May 1992 | 6 Oct 2008 | French | 73 years |
| Darren Noseworthy | Director | 24 Jul 2015 | 9 Jan 2017 | Canadian | 55 years |
| David Watson | Director | 16 Jul 1998 | 30 Jun 2003 | British | 75 years |
| Ewan John Mcdowall | Director | 27 Nov 2009 | 7 Feb 2014 | United Kingdom | 54 years |
| Ian Eric Franklin | Director | 27 Nov 2009 | 9 Feb 2021 | British | 60 years |
| Jean Hardy | Director | 31 May 1992 | 17 Sept 1993 | Belgian | 96 years |
| John Neil Roberts | Director | 14 Oct 2008 | 24 Feb 2010 | British | 58 years |
| John Richard Smith | Director | 3 Mar 2010 | 25 Feb 2015 | British | 65 years |
| John Rogers Stafford | Director | 31 May 1992 | 21 Mar 2002 | American | 88 years |
| Larry Gordon Sanders | Director | 30 Mar 2007 | 9 Mar 2010 | American | 69 years |
| Laura Cunningham | Director | 27 Nov 2009 | 16 May 2011 | United Kingdom | 56 years |
| Louis Philip Jones | Director | 19 Jul 2010 | 29 Feb 2012 | Uk | 61 years |
| Paul Anthony Reacher | Director | 5 Feb 1996 | 9 Mar 2010 | British | 70 years |
| Paul Anthony Reacher | Secretary | 31 May 1992 | 2 Oct 2001 | British | - |
| Paul John Grattan Stainer | Director | 19 Oct 2005 | 28 Jan 2007 | British | 62 years |
| Peter Charles Freeman | Director | 31 May 1992 | 28 Aug 1997 | British | 93 years |
| Robert Anthony Johns | Director | 31 May 1992 | 30 Apr 2005 | British | 80 years |
| Robert Noel Power | Director | 16 Jul 1998 | 8 Feb 2008 | American | 69 years |
| Ruth Amy Coles | Director | 27 Apr 2011 | 24 Jul 2015 | British | 51 years |
| Susan Jean Wallcraft | Director | 27 Nov 2009 | 6 Apr 2011 | United Kingdom | 59 years |
| Ulf Arne Wiinberg | Director | 14 Dec 2005 | 2 May 2008 | Danish | 67 years |
| Zsolt (emil) Lavotha | Director | 15 Sept 1993 | 26 May 1998 | Swedish | 75 years |