| Anne Clare Sheedy | Director | 4 May 2016 | 2 May 2017 | British | 55 years |
| Burness (directors) Limited | Corporate Director | 8 Feb 2012 | 8 Feb 2012 | United Kingdom | - |
| Caroline Elizabeth Conder | Director | 8 Feb 2012 | 24 Jan 2014 | British | 50 years |
| David Blackburn | Director | 8 Feb 2012 | 24 Jan 2014 | British | 65 years |
| Gary George Gray | Director | 8 Feb 2012 | 8 Feb 2012 | British | 56 years |
| Jason Michael Howard | Director | 14 Sept 2012 | 28 Feb 2018 | British | 55 years |
| Lorna Yvonne Collings | Director | 24 Jan 2014 | 3 May 2016 | British | 51 years |
| Nicholas Werner Curwen | Director | 23 Aug 2018 | 20 Feb 2023 | Luxembourger | 50 years |
| Nigel Kevin Govett | Director | 24 Jan 2014 | 11 Sept 2014 | British | 52 years |
| Robert Keith Alastair Bradburn | Director | 27 Mar 2015 | 29 Jun 2018 | British | 56 years |
| Willem Veurink | Director | 28 Feb 2018 | 21 Oct 2021 | Dutch | 47 years |