| Alison Ann Hargreaves | Secretary | 9 Aug 1993 | 13 Aug 1999 | British | - |
| Anthony William Searson James | Director | 18 Mar 2011 | 12 Sept 2013 | British | 58 years |
| Caroline Mary Tolhurst | Secretary | 13 Aug 1999 | 26 Jun 2003 | British | - |
| Christopher James Jukes | Director | 1 Apr 2014 | 27 Sept 2019 | British | 48 years |
| Deborah Clare Lee | Director | 27 Sept 2019 | 28 Mar 2022 | British | 50 years |
| Ian Douglas Mair | Director | 28 Mar 2022 | 27 Jun 2024 | British | 53 years |
| Ian Duncan Chisholm | Director | 28 Mar 2022 | 31 Dec 2023 | British | 59 years |
| James Creyke Hulton Whitty-lewis | Director | 28 Mar 2022 | 31 Mar 2025 | British | 45 years |
| Jeremy Henry Moore Newsum | Director | 12 Mar 1993 | 30 Jun 2008 | British | 71 years |
| John James | Director | 26 Jul 1991 | 12 Mar 1993 | British | 91 years |
| Jonathan Osborne Hagger | Director | 26 Jul 1991 | 31 May 2006 | British | 77 years |
| Jonathan Osborne Hagger | Secretary | 26 Jun 2003 | 31 May 2006 | British | - |
| Judith Patricia Ball | Secretary | 1 Jun 2006 | 29 Aug 2019 | British | - |
| Mark Robin Preston | Director | 1 Jul 2008 | 28 Mar 2022 | British | 58 years |
| Mark Robin Preston | Director | 27 Nov 2000 | 8 Mar 2002 | British | 58 years |
| Nicholas Richard Scarles | Director | 1 Jun 2006 | 31 May 2019 | British, | 64 years |
| Robert Richard Davis | Director | 1 Jun 2019 | 28 Mar 2022 | British | 59 years |
| Stephen Jeremy Moore | Director | 28 Mar 2022 | 30 Jun 2023 | British | 66 years |
| Stuart Robert Hartley Beevor | Director | 26 Jun 2003 | 17 Mar 2011 | British | 69 years |
| William Robert Holland | Secretary | 26 Jul 1991 | 9 Aug 1993 | British | - |
