| Alastair Cox Dempster | Director | 22 Jun 1992 | 30 Jun 1998 | British | 86 years |
| Alexander Douglas Peebles | Director | 30 May 1989 | 30 Apr 1990 | British | 79 years |
| Alexander Douglas Peebles | Secretary | 30 May 1989 | 30 Apr 1990 | British | - |
| Anne-marie Topping | Secretary | 3 Nov 2008 | 1 Mar 2010 | British | - |
| Ben Stephenson | Director | 7 Nov 2019 | 19 Apr 2023 | British | 45 years |
| Charles Marshall Love | Director | 19 Feb 1990 | 3 Jun 1992 | British | 81 years |
| Claude Kwasi Sarfo-agyare | Director | 25 May 2010 | 30 May 2012 | British | 57 years |
| Craig Cameron | Director | 29 Jun 1990 | 28 Jan 1999 | British | 67 years |
| Craig Cameron | Secretary | 1 May 1990 | 23 Aug 1991 | British | - |
| David Allan Metcalfe | Director | 24 Nov 2009 | 25 May 2010 | British | 60 years |
| David Dermot Hennessey | Secretary | 28 Sept 2016 | 8 Jan 2024 | - | - |
| David Howat Stewart | Director | 20 Aug 1993 | 30 Apr 1996 | British | 81 years |
| Edward Michael George Ettershank | Director | 28 Jun 2002 | 17 Oct 2008 | British | 79 years |
| Eric Wilson | Director | 30 May 1989 | 20 Nov 1989 | British | 91 years |
| Ernest Hume Murray | Director | 23 Sept 1991 | 30 May 1997 | British | 84 years |
| Gordon Campbell Smith | Director | 30 May 1989 | 30 Jun 1999 | British | 80 years |
| Gordon Ferguson | Director | 30 Oct 2009 | 30 Nov 2020 | British | 63 years |
| Gwynne Master | Director | 7 Apr 2021 | 11 Apr 2023 | Irish | 67 years |
| Ian David Lomas | Director | 24 Nov 2008 | 30 Apr 2014 | British | 67 years |
| Jeremy William Fraser | Secretary | 23 Aug 1991 | 30 Nov 2003 | British | - |
| John Andrew Spence | Director | 18 Oct 1996 | 20 Sept 2000 | British | 75 years |
| John Frederick Robson | Director | 30 Apr 2014 | 30 Jun 2015 | British | 69 years |
| Karina Trudy Mcteague | Secretary | 1 Dec 2003 | 3 Nov 2008 | British | - |
| Laurence John Edwards | Secretary | 1 Mar 2010 | 10 Jul 2012 | - | - |
| Manus Joseph Fullerton | Director | 9 Feb 2005 | 30 Oct 2009 | British | 77 years |
| Martin John Cooper | Director | 31 Jul 2012 | 22 Jan 2016 | British | 60 years |
| Michael Edward Fairey | Director | 15 May 1992 | 20 Aug 1993 | British | 78 years |
| Paul Gittins | Secretary | 10 Jul 2012 | 28 Sept 2016 | - | - |
| Peter Rowley Nestor-sherman | Director | 28 Jan 1999 | 10 Apr 2002 | British | 74 years |
| Ronald Nicol Mcintyre | Director | 22 Jul 1999 | 31 Dec 2008 | British | 84 years |
| Susan Ilene Rice | Director | 2 Oct 2000 | 30 Oct 2009 | American | 80 years |
| Timothy Biddle | Director | 6 Apr 2023 | 5 Aug 2024 | British | 41 years |
| Victoria Smith | Director | 22 Jan 2016 | 20 Jun 2023 | British | 54 years |
