| Alan Keith Olivier | Director | 22 Feb 2022 | 11 Oct 2022 | South African | 66 years |
| Alexander Scott Bell | Director | 2 Jul 1992 | 1 Jul 1998 | British | 85 years |
| Alice Ann Darwall | Secretary | 27 Mar 2020 | 1 Apr 2022 | - | - |
| Alvin Myron Glick | Director | 2 Jul 1992 | 19 May 1993 | Usa | 97 years |
| Andrew James Formica | Director | 26 Nov 2015 | 28 Apr 2022 | Australian,british | 55 years |
| Anthony Watson | Director | 1 Feb 2006 | 22 Apr 2015 | British | 81 years |
| Christophe Clamageran | Director | 9 Jun 2009 | 16 Nov 2009 | French | 63 years |
| David Alan Tyler | Director | 12 Jan 2013 | 7 Sept 2020 | British | 73 years |
| David Albert Edmonds | Director | 8 May 2003 | 28 Apr 2011 | British | 82 years |
| David John Atkins | Director | 1 Jan 2007 | 2 Nov 2020 | British | 60 years |
| Desmond De Beer | Director | 15 Jun 2020 | 11 Oct 2022 | South African | 66 years |
| Edward Bruce Heyland | Director | 2 Jul 1992 | 13 Aug 1993 | Canadian | 90 years |
| Emma Jane Jackman | Secretary | 1 Apr 2022 | 9 May 2022 | - | - |
| Francis Bede Charnock | Director | 1 Jan 1994 | 8 May 2003 | British | 92 years |
| Geoffrey Maitland Smith | Director | 2 Jul 1992 | 30 Sept 1999 | British | 93 years |
| George David Gwilt | Director | 2 Jul 1992 | 19 May 1994 | British | 99 years |
| Gerard Devaux | Director | 1 Oct 1999 | 8 Sept 2008 | French | 78 years |
| Graham Fenwick Pimlott | Director | 22 Sept 1993 | 31 Dec 2005 | British | 77 years |
| Gwyneth Victoria Burr | Director | 21 May 2012 | 28 Apr 2022 | British | 63 years |
| Hans Rainer Vogt | Director | 2 Jul 1992 | 31 Dec 1997 | British | 83 years |
| Jacques Espinasse | Director | 1 May 2007 | 25 Apr 2016 | French | 83 years |
| James Alan Lenton | Director | 16 Sept 2019 | 26 Apr 2021 | British | 51 years |
| James Henry Riddell | Director | 2 Jul 1992 | 30 Jun 1995 | British | 76 years |
| Jean-philippe Jacques Augustin Ghislain Mouton | Director | 1 Jan 2013 | 31 Dec 2018 | French | 65 years |
| John Andrew Bywater | Director | 27 Apr 1998 | 31 Mar 2007 | British | 79 years |
| John Charles Clare | Director | 1 Jan 1999 | 31 Dec 2009 | British | 76 years |
| John Frederick Nelson | Director | 1 May 2004 | 9 May 2013 | British | 79 years |
| John Raymond Hirst | Director | 1 Mar 2004 | 23 Apr 2014 | British | 74 years |
| John Richard Parry | Director | 2 Jul 1992 | 14 Jun 1993 | British | 92 years |
| Jonathan Michael Douglas Scott | Director | 2 Jul 1992 | 12 Aug 1993 | British | 80 years |
| Judith Mary Gibbons | Director | 1 May 2011 | 28 Apr 2020 | British | 69 years |
| Michael Martin Gill | Director | 2 Jul 1992 | 22 Sept 1993 | British | 90 years |
| Nicholas Timon Drakesmith | Director | 30 Jun 2011 | 1 Oct 2019 | British | 61 years |
| Peter William Beaumont Cole | Director | 1 Oct 1999 | 31 Dec 2018 | British | 67 years |
| Pierre Bruno Charles Bouchut | Director | 13 Feb 2015 | 4 May 2021 | French | 71 years |
| Rachel Sarah Booth | Secretary | 22 Sept 2011 | 27 Mar 2020 | - | - |
| Robert John Godwin Richards | Director | 2 Jul 1992 | 30 Sept 2009 | British | 70 years |
| Robert John Orr Barton | Director | 1 Jul 1998 | 3 May 2007 | British | 82 years |
| Ronald Richard Spinney | Director | 1 May 1993 | 30 Sept 2005 | British | 85 years |
| Roy Sidney Johnson | Director | 2 Jul 1992 | 31 Dec 1995 | British | 89 years |
| Roy Sidney Johnson | Secretary | 2 Jul 1992 | 31 Dec 1995 | British | - |
| Simon Richard Melliss | Director | 27 Mar 1995 | 30 Jun 2011 | British | 74 years |
| Stuart John Haydon | Secretary | 1 Jan 1996 | 22 Sept 2011 | British | - |
| Sydney Mason | Director | 2 Jul 1992 | 19 May 1994 | British | 106 years |
| Terence Duddy | Director | 3 Dec 2009 | 25 Jan 2019 | British | 70 years |
| Thomas Oliver Hutchison | Director | 2 Jul 1992 | 6 Jun 1998 | British | 95 years |
| Tony Ball | Director | 2 Jul 1992 | 16 Aug 1993 | Australian | 93 years |
| William Howitt Cairns | Director | 2 Jul 1992 | 15 Dec 1994 | Australian | 97 years |