| Alan Crawford Meek | Director | 4 Jun 1998 | 30 Nov 2006 | British | 59 years |
| Alan James Stewart | Director | 1 May 2009 | 30 Apr 2012 | British | 69 years |
| Alison Mary Gilson | Director | 30 Sept 2005 | 29 Oct 2013 | British | 48 years |
| Andrew Graham Alexander Walker | Director | 22 Apr 1997 | 1 Oct 2021 | British | 58 years |
| April Bingham | Director | 1 Aug 2007 | 11 Jul 2008 | British | 47 years |
| Calum Symon Jones | Director | 1 Aug 2007 | 26 Oct 2007 | British | 62 years |
| David Michael Kirchin | Director | 25 Feb 1998 | 15 Sept 2000 | British | 54 years |
| David William Deane | Director | 12 Jan 1995 | 28 Aug 1998 | British | 62 years |
| Derek Colin Wilson Pyle | Director | 20 Aug 1992 | 12 Jan 1995 | British | 74 years |
| Euan Alastair Cluness | Director | 11 Oct 2012 | 26 Apr 2024 | British | 48 years |
| Fraser Scott Jackson | Director | 20 Aug 1992 | 6 Apr 2018 | British | 72 years |
| Glen Douglas Gilson | Director | 9 Oct 2006 | 28 Feb 2013 | British | 49 years |
| Hannah Maria Sutter | Director | 5 Dec 1994 | 2 Mar 1999 | British | 65 years |
| Henderson Boyd Jackson Limited | Corporate Nominee Director | 10 Apr 1991 | 20 Aug 1992 | - | - |
| Henderson Boyd Jackson W.s. | Corporate Secretary | 10 Apr 1991 | 13 Mar 2006 | - | - |
| Hugh Roderick Macmaster | Director | 9 Jan 1998 | 12 Aug 2002 | British | 64 years |
| Iain Duncan Sutherland | Director | 22 Apr 1997 | 27 Aug 1999 | British | 55 years |
| Iain Stuart Catto | Director | 13 Nov 1997 | 27 Jan 1999 | British | 61 years |
| James Stewart Rennie | Director | 1 Aug 2007 | 31 Oct 2009 | British | 61 years |
| Jane Elizabeth Anne Tames | Director | 11 Jul 1995 | 2 Aug 1996 | British | 59 years |
| Malcolm Henry Mcpherson | Director | 20 Aug 1992 | 12 Jan 1995 | British | 72 years |
| Michael George Jeffrey | Director | 5 Dec 1994 | 3 Sept 1998 | British | 58 years |
| Michael Whitecross Scott | Director | 1 Sept 2006 | 30 Oct 2015 | British | 53 years |
| Michael Whitecross Scott | Director | 1 Apr 1999 | 31 Jan 2000 | British | 53 years |
| Neal John Cameron | Director | 26 Jan 2000 | 20 Apr 2000 | British | 53 years |
| Nicholas Scott Smith | Director | 6 Oct 1999 | 13 Nov 2000 | British | 53 years |
| Pamela Elizabeth Muir | Director | 1 Aug 2007 | 12 Sept 2008 | British | 53 years |
| Philip Andrew Dacker | Director | 19 Dec 2000 | 31 Oct 2004 | British | 77 years |
| Robert Stuart Dixon | Director | 18 Apr 2005 | 30 Sept 2005 | British | 50 years |
| Ross John Ward Blyth | Director | 20 Aug 1992 | 18 Apr 2005 | British | 65 years |
| Stephen Andrew Trombala | Director | 9 Jan 1998 | 25 Jan 1999 | British | 54 years |