| Alexia Susan Bennington | Director | 1 Jul 2013 | 30 Jul 2015 | British | 51 years |
| Andrew Thomas Karl Westenberger | Director | 22 Jun 2007 | 25 Jun 2008 | British | 59 years |
| Burness (directors) Limited | Corporate Nominee Director | 28 Nov 2005 | 7 Dec 2005 | United Kingdom | - |
| Cara Schulze | Director | 15 Jul 2015 | 10 Aug 2017 | German | 58 years |
| Darren Mckay | Director | 10 Aug 2017 | 25 Jul 2018 | British | 48 years |
| David Bell | Director | 24 Sept 2007 | 17 Sept 2010 | New Zealander | 52 years |
| Francis Harwood Banks | Director | 5 Nov 2019 | 6 May 2021 | British | 47 years |
| Frederick Edward Maconchy Lee | Director | 17 Sept 2010 | 28 Oct 2015 | British | 48 years |
| Gary Carl Romain | Director | 13 Jun 2008 | 15 Oct 2012 | British | 51 years |
| Gerald Mark Frederick Brawn | Director | 7 Dec 2005 | 13 Jun 2008 | British | 63 years |
| Louise Catherine Mcsweeney | Director | 17 Sept 2010 | 26 Sept 2011 | British | 52 years |
| Manish Temani | Director | 11 May 2021 | 15 Sept 2022 | Indian | 40 years |
| Mark David Cooper | Director | 26 Sept 2011 | 14 Aug 2013 | British | 52 years |
| Mark Francis Beastall | Director | 28 Feb 2014 | 10 Aug 2017 | British | 47 years |
| Martin Graham Miles | Director | 20 Oct 2008 | 28 Oct 2015 | British | 53 years |
| Melanie Candice Campbell | Director | 31 Oct 2012 | 13 Jun 2013 | British | 51 years |
| Paul Emney | Director | 7 Dec 2005 | 14 Oct 2008 | British | 59 years |
| Steven Alan Tait | Director | 10 Aug 2017 | 4 Nov 2019 | British | 47 years |