| Andrew Michael David Kirkman | Director | 19 Jan 2016 | 30 Jun 2019 | British | 54 years |
| Christopher Michael Birch | Director | 3 Nov 2016 | 30 Nov 2018 | British | 45 years |
| Edward Charles Peat | Director | 28 May 2013 | 14 Dec 2016 | British | 68 years |
| Gary Owens | Director | 3 Nov 2016 | 30 Nov 2018 | British | 43 years |
| Harworth Secretariat Services Limited | Corporate Secretary | 31 Oct 2012 | 8 Sept 2021 | United Kingdom | - |
| Ian Richard Ball | Director | 1 May 2015 | 30 Nov 2018 | British | 55 years |
| Ian Richard Ball | Director | 30 Jun 2019 | 8 Sept 2021 | British | 55 years |
| Jeremy Rhodes | Secretary | 31 May 2012 | 15 Aug 2012 | British | - |
| Jeremy Richard Hague | Director | 16 Feb 2011 | 21 Oct 2014 | British | 62 years |
| Michael Richardson | Director | 21 Oct 2014 | 29 Feb 2016 | British | 63 years |
| Philip Michael Wilson | Director | 10 Oct 2011 | 21 Jun 2018 | British | 58 years |
| Richard Andrew Cole | Secretary | 16 Feb 2011 | 31 May 2012 | - | - |
| Richard Owen Michaelson | Director | 16 Feb 2011 | 31 Dec 2020 | British | 60 years |
| Timothy John Love | Director | 28 May 2013 | 14 Dec 2016 | British | 64 years |