| Alan Peter Fordyce | Director | 9 Dec 2009 | 14 Apr 2015 | British | 59 years |
| Andrew David Clapp | Director | 8 Apr 2014 | 1 Aug 2018 | British | 51 years |
| Andrew James Livingston | Director | 5 Oct 2010 | 30 Sept 2013 | British | 54 years |
| Asset Management Solutions Limited | Corporate Secretary | 1 Jul 2014 | 30 Apr 2015 | United Kingdom | - |
| Christopher Richard Richardson | Director | 17 Jul 2019 | 21 Jul 2021 | British | 48 years |
| Clare Sheridan | Secretary | 1 May 2015 | 29 Feb 2016 | - | - |
| David Graham Blanchard | Director | 2 Mar 2010 | 11 Aug 2011 | British | 59 years |
| David Graham Blanchard | Director | 1 Aug 2012 | 28 Jun 2013 | British | 59 years |
| George Peter Farley | Director | 26 Nov 2013 | 27 Jun 2014 | British | 60 years |
| Infrastructure Managers Limited | Corporate Secretary | 29 Feb 2016 | 1 Jan 2022 | United Kingdom | - |
| Isobel Mary Nettleship | Secretary | 2 Mar 2010 | 31 May 2014 | British | - |
| John James Edward King | Director | 16 Feb 2010 | 7 Nov 2013 | British | 64 years |
| John Mcdonagh | Director | 7 Nov 2013 | 27 Jan 2017 | British | 57 years |
| John Stephen Gordon | Director | 27 Jan 2017 | 17 Jul 2019 | British | 64 years |
| Lindsay David Rotherforth | Director | 2 Mar 2010 | 5 Oct 2010 | British | 63 years |
| Nick Stuart English | Director | 6 Sept 2011 | 1 Aug 2012 | British | 66 years |
| Paul Lindsay Raymond Brooke | Director | 2 Mar 2010 | 1 Oct 2014 | British | 55 years |
| Paul Simon Andrews | Director | 28 Jun 2013 | 8 Apr 2014 | British | 56 years |
| Peter Kenneth Johnstone | Director | 27 Jan 2017 | 17 Apr 2019 | British | 61 years |
| Peter Kenneth Johnstone | Director | 21 Jul 2021 | 30 Jun 2023 | British | 61 years |
| Richard John Dixon | Director | 2 Mar 2010 | 27 Jun 2014 | British | 55 years |
| Robert Andrew Cawkwell | Director | 1 Oct 2014 | 27 Jan 2017 | British | 57 years |
| Rory William Christie | Director | 17 Apr 2019 | 15 May 2023 | British | 68 years |
