| Brian Michael Stammers | Director | 19 May 2004 | 16 Feb 2007 | British | 79 years |
| Bruno Gerald Frenguelli | Director | 20 Apr 2010 | 18 Sept 2020 | British | 59 years |
| Ederyn Williams | Director | 26 Aug 2009 | 30 Sept 2011 | British | 80 years |
| Enrique Llaudet Carles | Director | 4 Nov 2002 | 31 Aug 2006 | Spanish | 51 years |
| Everard Joseph Philip Mascarenhas | Director | 12 Aug 2014 | 28 Mar 2019 | British | 66 years |
| Gary Allan Glass | Director | 22 Dec 2015 | 9 Nov 2018 | British | 68 years |
| Quentin Mark Compton-bishop | Director | 27 Oct 2011 | 12 Aug 2014 | British | 70 years |
| Quentin Mark Compton-bishop | Director | 26 Apr 2017 | 18 Sept 2019 | British | 68 years |
| Warwick Ventures Limited | Corporate Director | 12 Aug 2014 | 10 Apr 2017 | United Kingdom | - |
| William Penn Moffitt | Director | 14 Nov 2017 | 6 Jan 2021 | American | 80 years |