| Adrian John Lawton-wallace | Director | 1 Apr 2014 | 22 Sept 2016 | British | 55 years |
| Caroline Anne Hewitt | Director | 7 Nov 2013 | 21 May 2015 | British | 62 years |
| Clive Harry Pitt | Director | 1 Nov 2011 | 23 Jul 2014 | British | 63 years |
| Darrell Boyd | Director | 22 Sept 2016 | 5 Jun 2018 | British | 58 years |
| Fulcrum Infrastructure Management Limited | Corporate Secretary | 22 Jun 2011 | 1 Aug 2019 | United Kingdom | - |
| Humphrey Kenneth Haslam Claxton | Director | 19 Jul 2012 | 1 May 2013 | British | 80 years |
| Ian Mark Willett | Director | 16 Aug 2022 | 4 Mar 2024 | British | 47 years |
| Jamie Russell Andrews | Director | 18 Jun 2015 | 7 Aug 2017 | British | 56 years |
| Jamie Russell Andrews | Director | 6 Jun 2018 | 6 May 2022 | British | 56 years |
| John Frederick Whitehead | Director | 5 Jun 2018 | 30 Nov 2018 | British | 62 years |
| Nafees Arif | Director | 22 Jun 2011 | 1 Nov 2011 | British | 53 years |
| Neil Terence Mcelduff | Director | 19 Jul 2012 | 6 Mar 2015 | British | 65 years |
| Nicola Ann Theron | Director | 23 Jul 2014 | 18 Jun 2015 | British | 64 years |
| Oliver David Hannan | Director | 1 May 2019 | 6 May 2022 | British | 53 years |
| Philippa Dawn Robinson | Director | 6 May 2022 | 22 Nov 2024 | New Zealander | 71 years |
| Richard Mark Ashcroft | Director | 22 Jun 2011 | 20 May 2015 | British | 59 years |
| Simon Christopher Waters | Director | 22 Nov 2024 | 17 Jun 2025 | British | 54 years |
| Tom Dobrashian | Director | 7 Aug 2017 | 6 Jun 2018 | British | 63 years |
