| Aberdeen Asset Management Plc | Corporate Secretary | 1 May 2014 | 6 May 2016 | - | - |
| Aberdeen Asset Management Plc | Corporate Secretary | 19 Oct 2017 | 6 Dec 2017 | United Kingdom | - |
| Alistair Linn Webster | Director | 1 May 2008 | 30 Jun 2009 | British | 73 years |
| Andrew David Clapp | Director | 23 Oct 2019 | 27 Aug 2021 | British | 51 years |
| Andrew William Geczy | Director | 13 Aug 2010 | 16 Jan 2013 | American | 63 years |
| Anthony Paul Owens | Director | 10 Jun 2013 | 30 Apr 2015 | British | 60 years |
| Ceri Richards | Director | 18 Aug 2008 | 9 Oct 2009 | British | 68 years |
| Dean Robert Buckley | Director | 2 May 2013 | 1 May 2014 | British | 66 years |
| Dorothy Elizabeth Lowry | Director | 24 Jun 2008 | 30 Jun 2009 | British | 66 years |
| Edward Arthur Wilson | Director | 6 Dec 2017 | 23 Oct 2019 | British | 61 years |
| Gary Robert Marshall | Director | 11 Jun 2014 | 6 May 2016 | British | 65 years |
| Gershon Daniel Cohen | Director | 9 Mar 2010 | 6 May 2016 | British | 62 years |
| Gershon Daniel Cohen | Director | 19 Oct 2017 | 6 Dec 2017 | British | 62 years |
| Graeme Robert Andrew Shankland | Director | 16 Jul 2007 | 4 Aug 2010 | British | 66 years |
| Graham John Mcdonald | Director | 4 Jul 2007 | 31 Mar 2014 | British | 66 years |
| Infrastructure Managers Limited | Corporate Secretary | 25 Jan 2019 | 21 Feb 2022 | United Kingdom | - |
| Jennifer Elizabeth Nielsen | Secretary | 4 Jul 2007 | 15 Jun 2012 | British | - |
| John Conway Moran | Director | 8 Sept 2008 | 29 Sept 2009 | British | 60 years |
| Karen Margaret Bothwell | Director | 30 Mar 2010 | 4 Oct 2013 | British | 64 years |
| Lloyds Secretaries Limited | Corporate Secretary | 15 Jun 2012 | 15 Aug 2012 | United Kingdom | - |
| Mark William Hammond | Director | 4 Jul 2007 | 4 Aug 2010 | British | 58 years |
| Martin James Gilbert | Director | 14 May 2014 | 26 Jun 2014 | British | 71 years |
| Mohammed Sameer Amin | Director | 25 Mar 2010 | 6 May 2016 | British | 53 years |
| Mohammed Sameer Amin | Director | 19 Oct 2017 | 6 Dec 2017 | British | 53 years |
| Nicholas Tommy Cole | Director | 6 Dec 2017 | 30 Apr 2019 | British | 48 years |
| Paula Burgess | Director | 6 Dec 2017 | 18 Dec 2020 | British | 51 years |
| Pinecroft Corporate Services Limited | Corporate Director | 18 Dec 2020 | 3 Mar 2025 | United Kingdom | - |
| Thomas Cuff Murphy | Director | 14 Aug 2010 | 15 Jun 2012 | American | 69 years |
| William Wordie Stancer | Director | 16 Jul 2007 | 9 Oct 2009 | British | 62 years |
