| Alastair Stiles Mcintosh | Director | 10 May 1989 | 31 Oct 1995 | British | 85 years |
| Alastair Stiles Mcintosh | Director | 18 Jan 1996 | 31 Dec 2020 | British | 85 years |
| Alex Gowl Nicol | Director | 7 Dec 2004 | 31 May 2005 | British | 71 years |
| Alex Robertson | Director | 1 Dec 2020 | 30 Sept 2022 | British | 52 years |
| Alexander Grant Gordon | Director | 11 Oct 1990 | 28 May 2002 | British | 94 years |
| Anthony Richard William Dick | Director | 6 Dec 2006 | 29 Aug 2018 | Scottish | 64 years |
| Anthony Richard William Dick | Secretary | 6 Dec 2006 | 29 Aug 2018 | Scottish | - |
| Anthony Schofield | Director | 7 Dec 2004 | 6 Nov 2008 | British | 66 years |
| Anthony Schofield | Director | 2 Dec 2014 | 9 Jun 2017 | British | 66 years |
| Barrie Mason Jackson | Director | 1 Jan 1994 | 31 May 2005 | British | 70 years |
| Barry Kergon | Director | 2 Dec 1999 | 26 Oct 2001 | British | 79 years |
| David Callum Robertson Graham | Director | 23 Feb 1996 | 6 Dec 2006 | British | 82 years |
| David Callum Robertson Graham | Secretary | 23 Feb 1996 | 6 Dec 2006 | British | - |
| David Jaffray Borthwick | Director | 3 Mar 1998 | 2 Dec 1999 | British | 82 years |
| Derrick John Fillingham | Director | 1 Jan 1994 | 31 May 1997 | British | 87 years |
| Emanuele Bascetta | Director | 2 Dec 1999 | 28 May 2002 | British | 69 years |
| Ewan Hudson | Director | 19 Mar 2019 | 31 Oct 2020 | British | 47 years |
| Gary Kenneth Gray | Director | 11 Dec 2001 | 11 Jun 2008 | British | 74 years |
| Glen James Gribbon | Director | 11 Dec 2001 | 7 Jul 2004 | British | 57 years |
| Herve Denis Michel Fetter | Director | 4 Dec 2008 | 22 Sept 2015 | French | 62 years |
| Hildreth Charles Craig | Director | 10 May 1989 | 30 Nov 1990 | British | 102 years |
| Iain Graeme Kennedy | Director | 22 Sept 2008 | 10 May 2012 | British | 61 years |
| Ian Henry Ross | Director | 10 May 1989 | 31 Dec 1993 | British | 83 years |
| Ivan Charles Straker | Director | 10 May 1989 | 31 Dec 1993 | British | 97 years |
| James Penman Findlay | Director | 10 May 1989 | 5 Sept 1994 | British | 87 years |
| James Penman Findlay | Secretary | 31 Dec 1989 | 5 Sept 1994 | British | - |
| John Alexander Rose Macphail | Director | 10 May 1989 | 31 Dec 1993 | British | 102 years |
| John Brian Ashworth | Director | 1 Jan 1994 | 2 Dec 1999 | British | 89 years |
| John Campbell | Director | 17 Jul 1997 | 31 May 2007 | British | 83 years |
| Jonathan Paul Norman Driver | Director | 3 Mar 1998 | 21 Sept 2005 | British | 64 years |
| Kenneth Kinnaird | Director | 5 Sept 1994 | 23 Feb 1996 | British | 80 years |
| Kenneth Kinnaird | Secretary | 5 Sept 1994 | 23 Feb 1996 | British | - |
| Kenneth Robert Robertson | Director | 1 Jun 2010 | 4 Jun 2015 | British | 75 years |
| Kenneth William Grier | Director | 21 Sept 2005 | 25 Sept 2018 | British | 67 years |
| Michael Colvin Keiller | Director | 4 Dec 2012 | 4 Sept 2014 | British | 71 years |
| Neil Goran Macdonald | Director | 25 Sept 2017 | 1 Jan 2019 | British | 64 years |
| Patrick Jean-francois Millet | Director | 21 Sept 2005 | 16 Mar 2010 | French | 79 years |
| Paul Gilbert Antrobus | Director | 11 Nov 1992 | 3 Mar 1998 | British | 84 years |
| Peter Frederick Smith | Director | 23 Sept 2014 | 9 Jun 2017 | British | 62 years |
| Peter Grant Gordon | Director | 10 Oct 2002 | 1 Jun 2010 | British | 66 years |
| Peter Julian Lederer | Director | 1 Jun 2010 | 4 Dec 2014 | British | 75 years |
| Robert Daniel Fergus Hartley | Director | 4 Dec 2014 | 31 Aug 2016 | British | 60 years |
| William Smith Watson | Secretary | 10 May 1989 | 31 Dec 1989 | British | - |