| Adam Paul Rutherford | Secretary | 26 Oct 2005 | 6 Sept 2006 | British | - |
| Adam Paul Rutherford | Secretary | 1 Dec 2006 | 14 Aug 2015 | British | - |
| Adrian Brettell Dyke | Secretary | 6 Sept 2006 | 7 Dec 2006 | British | - |
| Alistair Charles Fairley Smith | Director | 17 Nov 2010 | 26 Nov 2015 | British | 59 years |
| Alistair William Dixon | Director | 6 Aug 2007 | 4 Jul 2008 | British | 68 years |
| Andrew William Bartlett | Secretary | 14 Aug 2015 | 27 Jan 2016 | - | - |
| Andrew William Bartlett | Secretary | 25 Oct 2017 | 24 Nov 2022 | - | - |
| Christophoros Papachristophorou | Director | 24 Aug 2007 | 20 Nov 2012 | British | 58 years |
| Computershare Company Secretarial Services Limited | Corporate Secretary | 24 Nov 2022 | 30 Sept 2024 | United Kingdom | - |
| David Michael Brush | Director | 28 Jun 2006 | 12 Dec 2007 | American | 66 years |
| David Michael Brush | Director | 12 Dec 2007 | 25 Feb 2008 | American | 66 years |
| Denis Taylor | Director | 15 Jul 2015 | 23 Oct 2017 | British | 54 years |
| Gareth David Hayter | Director | 28 Jun 2006 | 26 Jun 2009 | British | 71 years |
| Gianluca Muzzi | Director | 9 Feb 2011 | 16 Jul 2019 | Italian | 56 years |
| Ivor Leonard Hogan | Director | 11 May 2015 | 30 Jun 2016 | British | 54 years |
| Jessica Hardman | Director | 16 Jul 2019 | 16 Aug 2024 | British | 47 years |
| John Benedict Mccarthy | Director | 28 Jun 2006 | 12 Dec 2007 | Australian | 68 years |
| John Richard Hammond | Director | 31 Jul 2019 | 30 Jun 2021 | British | 57 years |
| Kevin David Jones | Director | 26 Oct 2005 | 28 Jun 2006 | British | 61 years |
| Mark Mcdonald | Director | 12 Jun 2019 | 29 Dec 2022 | British | 53 years |
| Mark William Bolton | Director | 5 Jul 2012 | 31 Aug 2016 | Australian | 67 years |
| Nicholas Kristian James Calvert | Director | 16 Jul 2009 | 6 Nov 2015 | British | 56 years |
| Niral Pratapray Kalaria | Director | 11 Feb 2009 | 2 Aug 2011 | American | 56 years |
| Paul Arthur Hogwood | Secretary | 26 Oct 2005 | 6 Sept 2006 | British | - |
| Pierre Cherki | Director | 6 Aug 2007 | 5 Jul 2012 | French | 60 years |
| Richard Daniel Robinson | Director | 11 Oct 2024 | 6 Jun 2025 | British | 51 years |
| Scott Linsley | Secretary | 27 Jan 2016 | 24 Oct 2017 | - | - |
| Stephen James Thomas Shaw | Director | 26 Oct 2005 | 8 Jan 2023 | Australian | 69 years |
| Swift Incorporations Limited | Corporate Nominee Secretary | 26 Oct 2005 | 26 Oct 2005 | United Kingdom | - |
| William Hughes | Director | 28 Jun 2006 | 28 Sept 2007 | British | 60 years |
