| Alison Ann Hargreaves | Secretary | 1 Jan 1996 | 13 Aug 1999 | British | - |
| Brian Spencer Bowden | Director | 1 Jan 1996 | 29 Apr 2005 | British | 80 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 |
| Ian Michael Philip Staines | Director | 8 Jan 1991 | 16 Dec 1993 | British | 95 years |
| James Creyke Hulton Whitty-lewis | Director | 28 Mar 2022 | 31 Mar 2025 | British | 45 years |
| Jonathan Osborne Hagger | Director | 1 Jan 1996 | 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 | - |
| Nicholas Richard Scarles | Director | 31 May 2006 | 31 May 2019 | British, | 64 years |
| Richard Hamilton Dougal | Director | 8 Jan 1991 | 31 Dec 1995 | British | 71 years |
| Richard Hamilton Dougal | Secretary | 8 Jan 1991 | 31 Dec 1995 | British | - |
| Robert Michael Scott | Director | 16 Dec 1993 | 31 Dec 1995 | British | 89 years |
| Robert Richard Davis | Director | 1 Jun 2019 | 28 Mar 2022 | British | 59 years |
| Stephen Jeremy Moore | Director | 1 Jan 2008 | 30 Jun 2023 | British | 66 years |
| Stuart Robert Hartley Beevor | Director | 26 Jun 2003 | 17 Mar 2011 | British | 69 years |
| Timothy Leslie Budden | Director | 1 Jan 2008 | 28 Mar 2022 | British | 60 years |
