| Alexander George Bremner | Director | 17 Sept 2015 | 30 Jun 2017 | British | 72 years |
| Andrew Philip Graham Dixon | Director | 3 Sept 2020 | 11 Jun 2021 | British | 59 years |
| Benjamin Matthew Cashin | Director | 21 Sept 2018 | 8 Apr 2019 | British | 54 years |
| Benjamin Richard Glenton Griffiths | Director | 11 Jun 2021 | 13 Aug 2021 | British | 39 years |
| Charles George Alexander Mcleod | Director | 3 Sept 2020 | 11 Jun 2021 | British | 63 years |
| Charles John Ralph Sheldon | Director | 11 Jun 2021 | 29 Sept 2021 | British | 41 years |
| Christopher Holmes | Director | 11 Jun 2021 | 30 Oct 2024 | British | 50 years |
| David Adam Whitehurst | Director | 17 Sept 2015 | 3 Sept 2020 | British | 55 years |
| David Richard Bradbury | Director | 17 Sept 2015 | 3 Sept 2020 | British | 57 years |
| Egan Douglas Archer | Director | 11 Apr 2019 | 21 Oct 2020 | British | 59 years |
| Helen Downie | Director | 29 Sept 2021 | 30 Mar 2022 | British | 40 years |
| John Mark Isherwood | Director | 17 Sept 2015 | 21 Sept 2018 | British | 54 years |
| Maria Lewis | Secretary | 4 Jun 2015 | 4 Sept 2015 | - | - |
| Matthew Porter | Director | 30 Jun 2017 | 21 Sept 2018 | British | 49 years |
| Maxwell Francis Aitken | Director | 4 Jun 2015 | 17 Sept 2015 | British | 49 years |
| Maxwell Francis Aitken | Director | 23 Oct 2018 | 11 Jun 2021 | British | 49 years |
| Paul John Ireland | Director | 21 Sept 2018 | 21 Oct 2020 | British | 47 years |
| Philip Naylor | Secretary | 4 Sept 2015 | 19 Jan 2017 | - | - |
| Richard Marcus Whately | Director | 4 Jun 2015 | 23 Oct 2018 | British | 49 years |
| Teresa Sarah Hedges | Secretary | 19 Jan 2017 | 17 Sept 2018 | - | - |
| Theodora Forbes | Director | 30 Mar 2022 | 15 Nov 2022 | British | 37 years |
