| Alastair Muir Russell | Director | 30 Dec 1992 | 31 Jan 1995 | British | 77 years |
| Alexander Campbell Anderson | Director | 9 Sept 1996 | 5 Sept 1997 | British | 72 years |
| Ann Heron Gloag | Director | 31 Dec 1988 | 31 Dec 2019 | British | 84 years |
| Barry Edward Sealey | Director | 30 Dec 1992 | 31 Aug 2001 | British | 90 years |
| Brian John Cox | Director | 19 Oct 1992 | 3 Jul 2002 | British | 79 years |
| Brian Souter | Director | 31 Dec 1988 | 30 Jun 2022 | British | 72 years |
| Derek Scott | Director | 31 Dec 1988 | 6 Sept 1996 | British | 73 years |
| Derek Scott | Secretary | 19 Oct 1992 | 12 Nov 1993 | British | - |
| Derek Scott | Secretary | 4 Mar 1996 | 1 Sept 2004 | British | - |
| Ewan Brown | Director | 31 Dec 1988 | 31 Dec 2019 | British | 84 years |
| Frank Patrick Gallagher | Director | 14 Feb 2000 | 31 Aug 2001 | American | 83 years |
| Fraser Mcgregor Alexander | Director | 1 Apr 2013 | 30 Jun 2022 | British | 63 years |
| Garry Watts | Director | 1 Jul 2007 | 31 Jul 2016 | British | 70 years |
| Graham Charles Eccles | Director | 11 Sept 2000 | 30 Apr 2006 | British | 80 years |
| Helen Margaret Mahy | Director | 1 Jan 2010 | 29 Feb 2016 | British | 65 years |
| Iain Donaldson Duffin | Director | 12 Sept 2001 | 30 Jun 2010 | British | 80 years |
| James Daniel Bilefield | Director | 1 Feb 2016 | 30 Jun 2022 | British | 57 years |
| James William Leng | Director | 11 Jan 2000 | 20 Apr 2000 | British | 81 years |
| Janet Patricia Morgan | Director | 27 Apr 2001 | 30 Jun 2010 | British | 81 years |
| Jayne-anne Gadhia | Director | 1 Mar 2019 | 31 Jul 2019 | British | 65 years |
| John Russell Fotheringham Walls | Director | 30 Jun 2000 | 25 Aug 2006 | British | 82 years |
| Julie Helen Southern | Director | 7 Oct 2016 | 31 Aug 2018 | British | 67 years |
| Karen Ann Thomson | Director | 31 Mar 2016 | 30 Jun 2022 | British | 65 years |
| Keith Robertson Cochrane | Director | 4 Mar 1996 | 21 Jul 2002 | British | 61 years |
| Keith Robertson Cochrane | Secretary | 12 Nov 1993 | 4 Mar 1996 | British | - |
| Kippen Campbell Ws | Corporate Secretary | 31 Dec 1988 | 19 Oct 1992 | - | - |
| Lawrence Keith King | Director | 20 Sept 1999 | 14 Feb 2000 | American | 70 years |
| Martin Andrew Griffiths | Director | 25 Apr 2000 | 10 Jan 2023 | British | 60 years |
| Michael John Kinski | Director | 22 Jul 1997 | 14 Feb 2000 | British | 74 years |
| Michael John Vaux | Secretary | 1 Jan 2013 | 30 Jul 2024 | - | - |
| Philip Michael White | Director | 1 Jun 2010 | 31 Mar 2016 | British | 77 years |
| Robert Speirs | Director | 1 Mar 1995 | 31 Dec 2010 | British | 90 years |
| Ross John Paterson | Director | 1 May 2013 | 31 Jan 2023 | British | 55 years |
| Ross John Paterson | Secretary | 1 Sept 2004 | 1 Jan 2013 | British | - |
| Sir George Mathewson | Director | 8 Jun 2006 | 1 May 2013 | British | 86 years |
| William Barry Hinkley | Director | 19 Oct 1992 | 25 Jul 2000 | British | 77 years |
| William Elliott Whitehorn | Director | 1 May 2011 | 30 Jun 2020 | British | 66 years |