| Alan Victor Richardson | Director | 1 Apr 1999 | 31 Dec 2001 | British | 80 years |
| Alan William Mcculloch | Director | 19 Feb 1999 | 22 Feb 1999 | British | 60 years |
| Allan Leslie Leighton | Director | 8 Jan 2001 | 12 Jun 2002 | British | 73 years |
| Amparo Moraleda Martinez | Director | 21 Jan 2009 | 31 Jan 2012 | Spanish | 62 years |
| Andrew Ross Mitchell | Director | 23 Feb 1999 | 29 Mar 1999 | British | 74 years |
| Andrew Ross Mitchell | Secretary | 19 Feb 1999 | 30 Sept 2005 | British | - |
| Angus John Macdonald Of Tradeston | Director | 21 Jan 2009 | 8 Oct 2015 | British | 86 years |
| Anthony Luzzatto Gardner | Director | 11 Jul 2017 | 19 Feb 2018 | American | 63 years |
| Charles Andrew Berry | Director | 1 Apr 1999 | 6 Sept 2005 | British | 74 years |
| Charles Miller Smith | Director | 1 Aug 1999 | 23 Apr 2007 | British | 87 years |
| Charles Murray Stuart | Director | 29 Mar 1999 | 31 Mar 2000 | British | 93 years |
| Claire Louise O'neill | Director | 21 Mar 2022 | 17 Jan 2023 | British | 62 years |
| David Thomas Nish | Director | 13 Dec 1999 | 6 Sept 2005 | British | 66 years |
| Donald Hood Brydon | Director | 30 May 2003 | 23 Apr 2007 | British | 81 years |
| Duncan Whyte | Director | 29 Mar 1999 | 31 May 1999 | British | 80 years |
| Euan Baird | Director | 8 Jan 2001 | 23 Apr 2007 | British | 89 years |
| Ewen Cameron Stewart Macpherson | Director | 29 Mar 1999 | 25 Jul 2003 | British | 84 years |
| Fernando Becker Zuazua | Director | 24 Apr 2007 | 31 May 2012 | British | 71 years |
| Francisco Javier Morras Zuazo | Director | 23 Apr 2007 | 21 Jan 2009 | British | 73 years |
| Ian Robinson | Director | 23 Feb 1999 | 4 May 2001 | British | 84 years |
| Ian Simon Macgregor Russell | Director | 23 Feb 1999 | 16 Feb 2006 | British | 73 years |
| Javier Maria Urquiki | Director | 23 Apr 2007 | 24 Apr 2007 | Spanish | 65 years |
| John Alexander Campbell | Director | 13 Oct 2009 | 9 Feb 2011 | British | 60 years |
| John Olav Kerr Of Kinlochard | Director | 15 Jul 2009 | 21 Mar 2022 | British | 84 years |
| John Parnaby | Director | 29 Mar 1999 | 27 Jul 2001 | British | 89 years |
| Jose Luis Del Valle Doblado | Director | 23 Apr 2007 | 21 Jan 2009 | British | 72 years |
| Jose Luis San Pedro Gerenabarrena | Director | 24 Apr 2007 | 31 May 2012 | British | 80 years |
| Jose Miguel Alcolea Cantos | Director | 23 Apr 2007 | 15 Jun 2016 | Spanish | 56 years |
| Juan Carlos Rebollo Liceaga | Director | 9 Feb 2011 | 1 Mar 2020 | Spanish | 64 years |
| Judith A Johansen | Director | 1 Oct 2003 | 21 Mar 2006 | American | 68 years |
| Kcsg Farmer Cbe | Director | 21 Jan 2009 | 1 Jul 2017 | British | 86 years |
| Keith Robert Mckennon | Director | 30 Nov 1999 | 27 Jul 2001 | American | 93 years |
| Kenneth Leslie Vowles | Director | 23 Feb 1999 | 31 Mar 2002 | British | 84 years |
| Lesley Anne Glover | Director | 21 Mar 2022 | 26 Mar 2025 | British | 70 years |
| Mair Barnes | Director | 29 Mar 1999 | 23 Jul 2004 | British | 82 years |
| Mark Craig | Director | 19 Feb 1999 | 22 Feb 1999 | British | 52 years |
| Nancy Wilgenbusch | Director | 1 Jun 2004 | 23 Apr 2007 | American | 79 years |
| Nicholas Charles Rose | Director | 19 Feb 2003 | 23 Apr 2007 | British | 69 years |
| Nicholas Wenham Horler | Director | 10 Jun 2008 | 12 Oct 2010 | British | 67 years |
| Nicola Mary Brewer | Director | 11 Jul 2017 | 16 Mar 2020 | British | 69 years |
| Nolan Eldon Karras | Director | 30 Nov 1999 | 26 Jul 2006 | American | 82 years |
| Oswalds Of Edinburgh Limited | Corporate Nominee Secretary | 19 Feb 1999 | 19 Feb 1999 | United Kingdom | - |
| Peter Charles Fletcher Hickson | Director | 1 Sept 2006 | 23 Apr 2007 | British | 81 years |
| Peter Lewis Gregson | Director | 29 Mar 1999 | 23 Jul 2004 | British | 90 years |
| Philip Bowman | Director | 16 Jan 2006 | 23 Apr 2007 | Australian | 74 years |
| Philip Joseph Carroll Jnr | Director | 15 Jan 2002 | 15 May 2003 | American | 89 years |
| Philip Joseph Carroll Jnr | Director | 20 Oct 2003 | 22 Jul 2005 | American | 89 years |
| Ramon Antonio Fernandez | Director | 23 Apr 2007 | 24 Apr 2007 | Spanish | 60 years |
| Robert Gerald Miller | Director | 30 Nov 1999 | 7 Jun 2001 | American | 82 years |
| Ronald Garrick | Director | 29 Mar 1999 | 30 Apr 1999 | British | 86 years |
| Rupert James Stanley | Secretary | 30 Sept 2005 | 1 May 2006 | British | - |
| Sheelagh Jane Duffield | Director | 19 Feb 1999 | 19 Feb 1999 | British | 60 years |
| Sheelagh Jane Duffield | Secretary | 19 Feb 1999 | 19 Feb 1999 | British | - |
| Sheelagh Jane Duffield | Secretary | 1 May 2006 | 18 Sept 2007 | British | - |
| Simon Jonathan Lowth | Director | 1 Sept 2003 | 23 Apr 2007 | British | 65 years |
| Susan Catherine Deacon | Director | 18 Jul 2012 | 1 Jul 2017 | British | 62 years |
| Suzanne Fox | Director | 12 Dec 2018 | 12 Dec 2021 | British | 57 years |
| Vicky Lynn Anderson Bailey | Director | 1 Jun 2004 | 26 Jul 2006 | American | 74 years |