| Andrew Charles Appleyard | Director | 20 Dec 2013 | 12 Sept 2017 | British | 61 years |
| Aviva Company Secretarial Services Limited | Corporate Secretary | 15 Mar 2013 | 1 Feb 2014 | United Kingdom | - |
| Barry Steven Hill | Director | 3 Jun 2014 | 12 Sept 2017 | British | 55 years |
| Centrica Secretaries Limited | Corporate Secretary | 1 Oct 2010 | 15 Mar 2013 | United Kingdom | - |
| Charles William Grant Herriott | Director | 23 Mar 2021 | 1 Dec 2022 | British | 40 years |
| Darryl Guy Murphy | Director | 12 Sept 2017 | 24 Jan 2020 | British | 60 years |
| David Stephen Skinner | Director | 15 Mar 2013 | 12 Sept 2017 | British | 57 years |
| Fergus James Helliwell | Director | 12 Sept 2017 | 26 Jan 2021 | British | 45 years |
| Gearoid Martin Lane | Director | 1 Oct 2010 | 30 Oct 2012 | Irish | 62 years |
| Hamish Ramsey Floyd | Director | 9 Feb 2012 | 15 Mar 2013 | British | 52 years |
| Ian Shervell | Director | 12 Sept 2017 | 1 Dec 2022 | British | 48 years |
| Isaac Fidalgo Da Costa Vaz Rahimo | Director | 24 Jan 2020 | 4 Aug 2021 | Portuguese | 43 years |
| Joel Mark Woodliffe Lindsey | Director | 15 Mar 2013 | 9 May 2014 | New Zealand | 51 years |
| Jolanta Touzard | Director | 4 Aug 2021 | 1 Dec 2022 | British | 50 years |
| Jonathan Andrew Kimber | Director | 1 Oct 2010 | 15 Mar 2013 | British | 63 years |
| Nevin John Truesdale | Director | 1 Oct 2010 | 9 Feb 2012 | British | 52 years |
| Richard Peter Jones | Director | 15 Mar 2013 | 14 Dec 2013 | British | 65 years |
