| Alick Michael Rankin | Director | 27 Jun 1991 | 18 Aug 1998 | British | 91 years |
| Alistair Angus Cairns | Director | 12 Jul 1993 | 10 Feb 1994 | British | 81 years |
| Alistair Ian Macrae | Secretary | 12 Feb 1990 | 8 Jan 1993 | British | - |
| Anthony David Wilson Hamilton | Director | 20 Jun 1989 | 13 May 1992 | British | 80 years |
| Antony Gerald Shewell Brian | Secretary | 20 Jun 1989 | 12 Feb 1990 | British | - |
| Brian Thomas Dunlop | Director | 20 Jun 1989 | 26 Jun 1990 | British | 78 years |
| Colin George Campbell | Director | 20 Jun 1989 | 26 Jun 1990 | British | 64 years |
| David Francis Bell | Director | 20 Jun 1989 | 26 Jun 1990 | British | 75 years |
| David Robertson | Director | 9 Jul 1997 | 26 Jun 2002 | British | 65 years |
| Donald James Mcpherson | Director | 13 Mar 2002 | 20 Dec 2002 | British | 65 years |
| Douglas David Anderson | Director | 9 Jul 1997 | 20 Feb 2002 | British | 80 years |
| Douglas John Crawford | Director | 10 Feb 1994 | 9 Jul 1997 | British | 80 years |
| Gillian Suzanne Darragh | Director | 21 Jan 2021 | 17 Jan 2025 | British | 46 years |
| Harold Francis Baines | Director | 14 Nov 2001 | 31 Dec 2012 | British | 69 years |
| Hugh Kenneth Young | Director | 20 Jun 1989 | 15 Mar 1996 | British | 90 years |
| Iain William St Clair Scott | Director | 20 Jun 1989 | 12 Jan 1990 | British | 80 years |
| Iain William St Clair Scott | Director | 1 Sept 1997 | 30 Sept 2000 | British | 80 years |
| Ian Edward Young | Director | 26 Jun 1990 | 8 Sept 2003 | British | 68 years |
| Ian Robertson | Director | 26 Jun 1990 | 27 Mar 1991 | British | 77 years |
| James Robin Browning | Director | 9 Feb 1990 | 31 Aug 1997 | British | 87 years |
| John Calman Shaw | Director | 24 Jul 1990 | 18 Aug 1998 | British | 94 years |
| John Cook | Secretary | 20 Jun 1989 | 22 Jan 1998 | British | - |
| John Stewart Hunter | Director | 15 Mar 1996 | 14 Nov 2001 | British | 78 years |
| John Stewart Hunter | Secretary | 4 Sept 1995 | 15 Feb 1996 | British | - |
| Julie Helen Harvie | Director | 9 Jul 1997 | 11 Feb 2002 | British | 60 years |
| Karen Margaret Bothwell | Secretary | 8 Jan 1993 | 4 Sept 1995 | British | - |
| Kenneht Adam Brown | Director | 26 Jun 1990 | 28 Feb 2001 | British | 80 years |
| Lysanne Jane Warren Black | Secretary | 15 Feb 1996 | 30 Sept 2010 | British | - |
| Marc-john Boston | Director | 28 Oct 2010 | 30 Dec 2016 | British | 54 years |
| Mark Leonard Peel | Director | 11 Feb 2002 | 18 Oct 2006 | British | 57 years |
| Michael Fleming Grigor | Director | 26 Jun 1990 | 12 Jul 1993 | British | 62 years |
| Michael Francis Strachan | Director | 20 Jun 1989 | 5 Jun 1990 | British | 107 years |
| Michael John West | Director | 13 May 1992 | 9 Jul 1997 | British | 62 years |
| Richard Horner | Director | 12 Apr 2017 | 21 Jan 2021 | British | 57 years |
| Robert Balfour Of Burleigh | Director | 20 Jun 1989 | 11 Jun 1991 | British | 99 years |
| Robert Keith Moorhouse | Director | 8 Sept 2003 | 18 Oct 2006 | British | 59 years |
| Sally Mayer | Director | 18 Oct 2006 | 30 Sept 2010 | British | 58 years |
| Sharon Noelle Slattery | Director | 15 May 2013 | 12 Apr 2017 | Irish | 60 years |
| William Michael Murray | Director | 26 Jun 1990 | 9 Jul 1997 | British | 88 years |
| William Watson Cockburn Syson | Director | 20 Jun 1989 | 27 Mar 1991 | British | 96 years |