| Chantal Antonia Henderson | Director | 10 Aug 2015 | 22 May 2019 | British | 51 years |
| Christopher James Jukes | Director | 22 May 2019 | 27 Sept 2019 | British | 48 years |
| Craig David Mcwilliam | Director | 28 Apr 2016 | 22 May 2019 | British | 54 years |
| Deborah Clare Lee | Director | 27 Sept 2019 | 28 Mar 2022 | British | 50 years |
| Derek John Lewis | Secretary | 7 Jun 2018 | 22 May 2019 | - | - |
| James Creyke Hulton Whitty-lewis | Director | 28 Mar 2022 | 5 Oct 2022 | British | 45 years |
| Katharine Emma Robinson | Secretary | 10 Aug 2015 | 7 Jun 2018 | - | - |
| Mark Robin Preston | Director | 22 May 2019 | 28 Mar 2022 | British | 58 years |
| Peter Sean Vernon | Director | 10 Aug 2015 | 31 Dec 2016 | British | 67 years |
| Richard Allan Jeffrey Marshall | Director | 22 May 2019 | 31 Dec 2021 | British | 62 years |
| Robert Richard Davis | Director | 27 Sept 2019 | 28 Mar 2022 | British | 59 years |
| Roger Frederick Crawford Blundell | Director | 10 Aug 2015 | 22 May 2019 | British | 64 years |
| Simon Geoffrey Harding-roots | Director | 28 Apr 2016 | 22 May 2019 | British | 58 years |
| Stephen Jeremy Moore | Director | 22 May 2019 | 5 Oct 2022 | British | 66 years |
| Ulrike Schwarz-runer | Director | 22 Jul 2015 | 28 Apr 2016 | Austrian | 55 years |
| William Robert Bax | Director | 25 Jan 2017 | 1 Jun 2018 | British | 48 years |