| Alan Ewing Mills | Secretary | 7 Jan 1991 | 11 Dec 1998 | British | - |
| Alan Ewing Mills | Secretary | 14 Jun 2000 | 27 Jan 2005 | British | - |
| Allan Blair Beattie | Director | 14 Jun 2000 | 10 Nov 2000 | British | 63 years |
| Angela Mary Cunningham | Secretary | 1 Aug 2008 | 19 Jan 2011 | British | - |
| Annabel Susan Graham | Secretary | 14 Nov 2005 | 1 Sept 2006 | British | - |
| Brian Buchanan Scouler | Director | 14 Jun 2000 | 25 May 2001 | British | 66 years |
| Carol Lyn Carmichael Edmunds | Director | 13 Dec 2006 | 2 Jul 2007 | South African | 55 years |
| David Edmund Cartledge | Director | 31 Jul 1995 | 14 Jun 2000 | British | 79 years |
| David Elston | Director | 7 Jan 1991 | 30 Jan 1992 | British | 74 years |
| David Ronald Giffin | Director | 13 Feb 2003 | 31 Oct 2007 | British | 64 years |
| Derek Stephen Sach | Director | 31 Jul 1995 | 13 Mar 1997 | British | 77 years |
| Derek Stephen Sach | Director | 11 Dec 1998 | 14 Jun 2000 | British | 77 years |
| Douglas Grahame Hawkins | Director | 24 Nov 2004 | 16 Jul 2007 | British | 54 years |
| Eric George William Tough | Director | 7 Jan 1991 | 30 Jan 1992 | British | 68 years |
| Ernest Michael Sheavills | Director | 31 Jul 1995 | 14 Jun 2000 | British | 80 years |
| Grahame Taylor Whitehead | Director | 31 Jul 1995 | 14 Jun 2000 | British | 75 years |
| Guy Howard Cato | Director | 2 Mar 2012 | 8 Nov 2017 | British | 54 years |
| Hew Campbell | Director | 1 Sept 1994 | 31 Jul 1995 | British | 63 years |
| Ian Alexander Walker | Director | 30 Jan 1992 | 30 Jan 1993 | British | 79 years |
| Ian David Beattie | Director | 14 Jan 2002 | 20 Jan 2003 | British | 59 years |
| Ian Mcgillivray | Director | 13 Feb 2003 | 20 Mar 2014 | British | 60 years |
| John Donald Black Workman | Director | 14 Jun 2000 | 12 Dec 2006 | British | 73 years |
| John Thomas Henry Miller | Director | 30 Jan 1992 | 31 Jul 1995 | British | 82 years |
| Kennedy Campbell Foster | Director | 30 Jan 1992 | 15 Aug 1994 | British | 75 years |
| Lindsey Mcmurray | Director | 13 Dec 2005 | 1 Mar 2012 | British | 54 years |
| Marcos Castro | Secretary | 1 Sept 2006 | 1 Aug 2008 | Other | - |
| Marina Louise Thomas | Secretary | 28 Jan 2005 | 18 Nov 2005 | British | - |
| Mark James Danby | Director | 3 Nov 2003 | 1 Mar 2012 | British | 57 years |
| Mark Mccracken Bailie | Director | 24 Nov 2004 | 27 Jan 2005 | British | 52 years |
| Mark Patrick Nicholls | Director | 14 Jun 2000 | 31 Mar 2003 | British | 76 years |
| Matthew Edward Alphage Irish | Director | 18 Sept 2014 | 8 Nov 2017 | British | 46 years |
| Miller Roy Mclean | Director | 7 Jan 1991 | 31 Jul 1995 | British | 76 years |
| Paul Denzil John Sullivan | Director | 2 Mar 2012 | 5 Mar 2014 | British | 59 years |
| Philip Andrew Carraro | Director | 9 Jun 1999 | 14 Jun 2000 | United States Citizen | 81 years |
| Rachel Elizabeth Fletcher | Secretary | 19 Jan 2011 | 27 Apr 2012 | - | - |
| Rbs Secretarial Services Limited | Corporate Secretary | 27 Apr 2012 | 26 Sept 2019 | United Kingdom | - |
| Robert Dyllan Hook | Director | 5 Mar 2014 | 8 Nov 2017 | British | 55 years |
| Robert Henry Beattie | Director | 31 Jul 1995 | 14 Jun 2000 | British | 76 years |
| Robert Speirs | Director | 13 Mar 1997 | 23 Oct 1998 | British | 89 years |
| Rory Malcolm Cullinan | Director | 13 Feb 2003 | 21 Jul 2004 | British | 66 years |
| Shirley Margaret Macgillivray | Secretary | 11 Dec 1998 | 14 Jun 2000 | British | - |
| Simon Jonathan Chrispin | Director | 11 Dec 1998 | 14 Jun 2000 | British | 63 years |
| Simon Jonathan Chrispin | Director | 6 Apr 2001 | 22 Mar 2002 | British | 63 years |
| Stephen Paul Nixon | Director | 8 Nov 2017 | 26 Apr 2019 | British | 55 years |
| Victoria Anne Alexander | Director | 1 Nov 2000 | 15 Oct 2001 | British | 54 years |
| William Troup | Director | 15 Oct 2001 | 20 Mar 2004 | British | 64 years |