| Alistair William Carnegie Keddie | Director | 26 Mar 2003 | 26 Oct 2004 | British | 83 years |
| Anthony Howard Stockwell | Secretary | 26 Mar 2003 | 1 Jul 2010 | British | - |
| Bradley Paul Duncan | Secretary | 7 Jul 2015 | 12 Dec 2018 | - | - |
| Carbon Trust Investments Limited | Corporate Director | 17 Aug 2009 | 20 May 2010 | United Kingdom | - |
| Christopher Alan Stark | Director | 29 Apr 2024 | 31 Jul 2024 | British | 48 years |
| Christopher John Mottershead | Director | 26 Mar 2003 | 1 Feb 2020 | British | 71 years |
| Claire Anne Williams | Secretary | 1 Jul 2010 | 26 Sept 2014 | - | - |
| Claire Durkin | Director | 26 Oct 2004 | 14 Oct 2005 | British | 70 years |
| Colin Imrie | Director | 12 May 2009 | 8 Jun 2010 | British | 69 years |
| Gina Verissimo Hall | Director | 4 Nov 2011 | 1 Nov 2022 | American | 65 years |
| Gordon David Innes | Director | 20 May 2010 | 15 Jun 2011 | British | 55 years |
| Ian Frederick Stephenson | Director | 26 Mar 2003 | 27 Sept 2012 | English | 78 years |
| Ian Gerald Mcallister | Director | 26 Mar 2003 | 22 Sept 2011 | British | 83 years |
| James Matheson Smith | Director | 17 Feb 2011 | 12 Jul 2018 | British | 75 years |
| James William Eykyn Maitland Hume | Director | 8 Jun 2010 | 1 Jul 2011 | British | 55 years |
| Jane Elizabeth Morgan | Director | 14 Nov 2006 | 12 May 2009 | British | 73 years |
| John Walter Edmonds | Director | 26 Mar 2003 | 27 Sept 2013 | British | 82 years |
| Julia Elizabeth King | Director | 16 Jul 2018 | 14 Aug 2020 | British | 72 years |
| Laura Byrne | Secretary | 11 Mar 2019 | 22 Sept 2023 | - | - |
| Marie Julia O'dwyer | Director | 22 Apr 2024 | 23 Jul 2025 | Irish | 46 years |
| Michael Anthony Rea | Director | 12 Jun 2008 | 23 Jul 2025 | Irish | 58 years |
| Milena Radoycheva | Secretary | 4 Dec 2023 | 31 Mar 2024 | - | - |
| Nicholas Timon Drakesmith | Director | 20 Jul 2020 | 25 Apr 2024 | British | 61 years |
| Nqh (co Sec) Limited | Corporate Nominee Secretary | 28 Jan 2003 | 26 Mar 2003 | - | - |
| Nqh Limited | Corporate Nominee Director | 28 Jan 2003 | 26 Mar 2003 | United Kingdom | - |
| Paul Howard Jefferiss | Director | 26 Mar 2003 | 14 Aug 2020 | British | 71 years |
| Peggy Jean Cruickshank | Director | 11 Jun 2008 | 8 Aug 2011 | British | 69 years |
| Peter Graham Waller | Director | 14 Oct 2005 | 28 Mar 2008 | British | 72 years |
| Richard John Brook | Director | 26 Mar 2003 | 22 Sept 2011 | British | 88 years |
| Robin Shand Naysmith | Director | 26 Mar 2003 | 30 Nov 2004 | British | 69 years |
| Rosemary Jane Cecilia Boot | Director | 26 Mar 2003 | 1 Aug 2011 | British | 64 years |
| Thomas Auguste Read Delay | Director | 26 Mar 2003 | 31 Mar 2024 | British | 67 years |
| Wilson Malone | Director | 30 Nov 2004 | 14 Nov 2006 | British | 71 years |