| Alan Campbell Ritchie | Director | 22 Dec 2005 | 30 Apr 2006 | British | 58 years |
| Alan Campbell Ritchie | Director | 21 May 2009 | 14 Oct 2009 | British | 58 years |
| Alan Philip Scott | Director | 13 Jun 2006 | 19 Nov 2010 | British | 59 years |
| Alan Scott | Director | 7 Jun 2004 | 22 Dec 2005 | British | 59 years |
| Alasdair Campbell | Director | 7 Dec 2021 | 9 Feb 2024 | British | 41 years |
| Alexander George Bremner | Director | 21 Jan 2003 | 7 Jun 2004 | British | 71 years |
| Alexander George Bremner | Director | 22 Feb 2008 | 4 Feb 2011 | British | 71 years |
| Alexander George Bremner | Director | 1 Jan 2012 | 30 Jul 2013 | British | 71 years |
| Alison Groat | Director | 20 Feb 2024 | 12 Feb 2025 | British | 45 years |
| Andrew David Bruce | Director | 14 Feb 2006 | 6 Nov 2008 | British | 53 years |
| Biif Corporate Services Limited | Corporate Director | 4 Mar 2011 | 10 Feb 2016 | United Kingdom | - |
| Carlos Abuin Garcia | Director | 1 Nov 2017 | 5 Oct 2018 | Spanish | 40 years |
| David Fulton Gilmour | Director | 4 Mar 2011 | 12 Nov 2021 | British | 62 years |
| David Niall Smith | Director | 31 Mar 2015 | 20 Feb 2024 | British | 54 years |
| Derek Orr Anderson | Director | 22 Dec 2005 | 13 May 2008 | British | 61 years |
| Dylan Fletcher | Director | 22 Dec 2005 | 12 Feb 2025 | British | 54 years |
| Elena Giorgiana Wegener | Director | 31 Oct 2013 | 7 Dec 2021 | British | 50 years |
| Geoffrey Alan Quaife | Director | 19 Oct 2012 | 1 Nov 2017 | British | 70 years |
| Gordon James Wilson | Secretary | 16 May 2012 | 6 Aug 2013 | British | - |
| James Leil Park | Director | 17 Mar 2006 | 6 Jan 2016 | British | 71 years |
| John Christian Elliot | Director | 22 Dec 2005 | 25 Jul 2006 | British | 73 years |
| John Wrinn | Director | 12 Nov 2021 | 30 Jan 2023 | British | 63 years |
| Kenneth William Gillespie | Director | 1 Jul 2008 | 31 Dec 2011 | British | 64 years |
| Mark Baxter | Director | 18 Feb 2008 | 19 Oct 2012 | British | 53 years |
| Mark Geoffrey David Holden | Director | 19 Oct 2012 | 31 Oct 2013 | British | 68 years |
| Martin Timothy Smith | Director | 22 Dec 2005 | 31 Jan 2025 | British | 58 years |
| Moray David Watt | Director | 14 Feb 2006 | 21 May 2009 | British | 59 years |
| Pamela June Smyth | Secretary | 21 Jan 2003 | 16 May 2012 | British | - |
| Philip Mcvey | Director | 12 Dec 2005 | 19 Oct 2012 | British | 65 years |
| Priya Ruth Veerapen | Director | 7 Jul 2010 | 4 Mar 2011 | Malaysian | 45 years |
| Quill Form Limited | Corporate Nominee Director | 9 Oct 2002 | 21 Jan 2003 | United Kingdom | - |
| Quill Serve Limited | Corporate Nominee Secretary | 9 Oct 2002 | 21 Jan 2003 | United Kingdom | - |
| Robin Smith Mackie | Director | 22 Dec 2005 | 18 Feb 2008 | British | 75 years |
| Ronald Gilfillan Jack | Director | 22 Feb 2007 | 31 Mar 2015 | British | 70 years |
| Victoria Louise Bradley | Director | 14 Oct 2009 | 4 Mar 2011 | British | 54 years |