| Alistair James Wivell | Director | 16 Nov 1992 | 10 Jun 1994 | British | 81 years |
| Anthony Francis Pryor | Director | 27 Jul 1994 | 6 Apr 2006 | British | 79 years |
| Archibald Anderson Bethel | Director | 28 Jun 2007 | 19 Sept 2016 | British | 73 years |
| Basil Richard Ryland Butler | Director | 16 Nov 1992 | 21 Sept 1994 | British | 96 years |
| David Addison Milne Dunbar | Director | 16 Nov 1992 | 28 Jun 2007 | British | 85 years |
| Dennis Ernest Gilbert | Director | 1 Oct 1996 | 1 Jan 2011 | British | 79 years |
| Derek Malcolm Jones | Director | 1 Jan 2011 | 25 Nov 2024 | British | 55 years |
| Franco Martinelli | Director | 2 Mar 2010 | 25 May 2016 | British | 66 years |
| Gary Lambert | Director | 25 May 2016 | 3 Nov 2020 | British | 60 years |
| George Traill Lyon | Secretary | 16 Nov 1992 | 29 Aug 1997 | British | - |
| Haro Moushegh Bedelian | Director | 6 Jul 1995 | 1 Oct 1998 | British | 83 years |
| Henry William Warren | Director | 16 Nov 1992 | 4 Apr 2008 | British | 76 years |
| Henry William Warren | Secretary | 4 Sept 1997 | 4 Apr 2008 | British | - |
| Iain Stuart Urquhart | Director | 28 Jun 2007 | 19 Sept 2016 | British | 61 years |
| James Arnot Hamilton | Director | 16 Nov 1992 | 21 Mar 1997 | British | 103 years |
| John David Taylor Greig | Secretary | 1 Apr 2008 | 1 Jun 2014 | Other | - |
| John Jeremy Black | Director | 16 Nov 1992 | 25 Mar 1997 | British | 94 years |
| John Wallace Howie | Director | 1 Jan 2011 | 31 Mar 2021 | British | 59 years |
| Julia Mary Wood | Secretary | 1 Jun 2014 | 31 Jul 2024 | - | - |
| Michael Jeffrey Leece | Director | 16 Nov 1992 | 30 Jun 1996 | British | 81 years |
| Nicholas James William Borrett | Secretary | 27 Jul 2012 | 25 Feb 2013 | - | - |
| Peter Lloyd Rogers | Director | 28 Jun 2007 | 25 May 2016 | British | 79 years |
| Robert James Davidson | Director | 10 Jun 1994 | 31 Mar 1996 | British | 98 years |
| Ronald Garrick | Director | 16 Nov 1992 | 31 Jan 1999 | British | 86 years |
| Stuart James Siddall | Director | 24 Nov 1994 | 30 Apr 1995 | British | 73 years |
| Thomas Mayer | Director | 16 Nov 1992 | 1 Mar 1997 | British | 98 years |
| Valerie Francine Anne Teller | Secretary | 1 Sept 2010 | 27 Jul 2012 | - | - |
| William D'arcy Erith | Director | 19 May 2021 | 11 Aug 2023 | British | 53 years |
| William Tame | Director | 28 Jun 2007 | 17 Dec 2014 | British | 72 years |