| Andrew Daryl Le Poidevin | Director | 14 Jul 2017 | 8 Dec 2017 | British | 68 years |
| Andrew Daryl Le Poidevin | Director | 1 Jun 2018 | 31 May 2019 | British | 68 years |
| Brian Hobden | Secretary | 5 Aug 2006 | 15 Nov 2006 | British | - |
| Bruce David Neil Bricknell | Director | 1 Jan 2014 | 13 Jul 2016 | British | 63 years |
| Centrica Secretaries Limited | Corporate Secretary | 2 Oct 2009 | 31 Dec 2018 | United Kingdom | - |
| Christopher Martin Cox | Director | 8 Dec 2017 | 8 Dec 2017 | British | 65 years |
| Christopher Warnes | Director | 1 Jan 2014 | 1 Jul 2015 | British | 57 years |
| Dennis Gareth Jones | Director | 1 Nov 2019 | 30 Aug 2024 | British | 61 years |
| Ewan Craig Neilson | Nominee Director | 25 Jul 2006 | 5 Aug 2006 | British | 68 years |
| Fraser Dawson Weir | Director | 13 Jul 2016 | 31 May 2018 | British | 54 years |
| Gerald Martin Harrison | Director | 8 Dec 2017 | 24 Jun 2022 | British | 72 years |
| Iain Douglas Bartholomew | Director | 16 Apr 2012 | 1 Jan 2014 | British | 68 years |
| John Cowie | Director | 5 Aug 2022 | 7 Apr 2023 | British | 58 years |
| Jonathan David Murphy | Director | 5 Aug 2006 | 14 May 2009 | British | 70 years |
| Jonathan Leslie Roger | Director | 14 May 2009 | 20 May 2013 | British | 57 years |
| Marie-louise Clayton | Director | 5 Aug 2006 | 6 Dec 2007 | British | 66 years |
| Michael John Wagstaff | Director | 5 Aug 2006 | 2 Oct 2009 | British | 65 years |
| Neil James Mcculloch | Director | 1 Jan 2019 | 29 Sept 2023 | British | 56 years |
| Nicholas William Maddock | Director | 9 Nov 2009 | 5 Jul 2011 | British | 55 years |
| Nicola Jane Macleod | Director | 11 Sept 2018 | 31 Jul 2024 | British | 52 years |
| Nicola Macleod | Secretary | 29 Jan 2019 | 31 Jul 2024 | - | - |
| Paul De Leeuw | Director | 11 May 2011 | 16 Aug 2013 | British | 62 years |
| Paul Ian Hedley | Director | 1 Sept 2011 | 25 Oct 2013 | British | 57 years |
| Paul Martyn Tanner | Director | 8 Dec 2017 | 31 May 2018 | British | 53 years |
| Peter Andrew Turner | Director | 6 Dec 2007 | 2 Oct 2009 | British | 56 years |
| Richard Ozsanlav | Director | 1 Jan 2014 | 5 Jun 2015 | British | 57 years |
| Roderick Mcintosh Begbie | Director | 3 Sept 2007 | 2 Oct 2009 | British | 60 years |
| Roy Andrew Lumsden | Director | 5 Jun 2015 | 14 Jul 2017 | British | 68 years |
| Rune Martinsen | Director | 1 Jun 2018 | 31 Dec 2018 | Norwegian | 61 years |
| Sarwjit Sambhi | Director | 20 May 2013 | 1 Jan 2014 | British | 57 years |
| Scott Mcginigal | Director | 18 Sept 2024 | 18 Jul 2025 | British | 55 years |
| Simon Nicholas Waite | Secretary | 15 Nov 2006 | 2 Oct 2009 | British | - |
| Stronachs | Corporate Nominee Secretary | 25 Jul 2006 | 5 Aug 2006 | - | - |
| Vincent Mark Hanafin | Director | 2 Oct 2009 | 8 Feb 2010 | British | 67 years |
