| Christopher James Jukes | Director | 8 May 2014 | 27 Sept 2019 | British | 48 years |
| Deborah Clare Lee | Director | 27 Sept 2019 | 28 Mar 2022 | British | 50 years |
| Ian Douglas Mair | Director | 14 Nov 2013 | 8 May 2014 | British | 53 years |
| Ian Douglas Mair | Director | 28 Mar 2022 | 27 Jun 2024 | British | 53 years |
| Ian Duncan Chisholm | Director | 31 Dec 2021 | 31 Dec 2023 | British | 59 years |
| James Creyke Hulton Whitty-lewis | Director | 28 Mar 2022 | 31 Mar 2025 | British | 45 years |
| Judith Patricia Ball | Secretary | 8 May 2014 | 9 May 2019 | - | - |
| Katharine Robinson | Secretary | 5 Nov 2013 | 8 May 2014 | - | - |
| Mark Robin Preston | Director | 8 May 2014 | 28 Mar 2022 | British | 58 years |
| Nicholas Richard Scarles | Director | 8 May 2014 | 31 May 2019 | British, | 64 years |
| Peter Sean Vernon | Director | 14 Nov 2013 | 8 May 2014 | British | 67 years |
| Peter Sean Vernon | Director | 28 Mar 2017 | 30 Sept 2021 | British | 67 years |
| Richard Allan Jeffrey Marshall | Director | 12 Jun 2015 | 31 Dec 2021 | British | 62 years |
| Robert Richard Davis | Director | 1 Jun 2019 | 28 Mar 2022 | British | 59 years |
| Roger Frederick Crawford Blundell | Director | 14 Nov 2013 | 8 May 2014 | British | 64 years |
| Stephen Jeremy Moore | Director | 8 May 2014 | 30 Jun 2023 | British | 66 years |
| Timothy Leslie Budden | Director | 8 May 2014 | 28 Mar 2022 | British | 60 years |
| Ulrike Schwarz-runer | Director | 5 Nov 2013 | 8 May 2014 | Austrian | 55 years |
