| Christophe Andre Bernard Chapron | Director | 19 Feb 2007 | 1 Mar 2016 | French | 62 years |
| David Andrew Sherwin | Director | 12 Jul 1991 | 31 Jan 2002 | British | 79 years |
| David Courtenay Palmer-jones | Director | 1 Oct 2008 | 3 Jun 2015 | British | 63 years |
| David Courtenay Palmer-jones | Director | 3 Jun 2015 | 1 Jan 2020 | British | 63 years |
| Elizabeth Jayne Clare Cooper | Secretary | 1 Oct 2001 | 31 Jul 2003 | British | - |
| Florent Thierry Antoine Duval | Director | 1 Feb 2016 | 31 Oct 2021 | French | 50 years |
| Ian Anthony Sexton | Director | 1 Oct 2001 | 19 Feb 2007 | British | 70 years |
| Ian Frederick Goodfellow | Director | 1 Oct 2001 | 31 May 2003 | British | 72 years |
| Jack Malcolm Lewis | Secretary | 12 Jul 1991 | 1 Nov 2001 | British | - |
| Joan Knight | Secretary | 31 Jul 2003 | 6 May 2025 | British | - |
| John Albert Matravers | Director | 18 Jun 1997 | 31 May 2002 | British | 81 years |
| Keith Charles Cartwright | Director | 12 Jul 1991 | 9 Jan 2002 | British | 85 years |
| Per-anders Hjort | Director | 31 May 2003 | 1 Oct 2008 | Swedish | 68 years |
| Philip John Scarborough | Director | 12 Jul 1991 | 23 Jan 2002 | British | 74 years |
| Robert Anthony Mills | Director | 18 Jun 1997 | 23 Dec 1999 | British | 54 years |
| Stephen Terence Mills | Director | 12 Jul 1991 | 8 Jan 2002 | British | 63 years |
| Terrence Frederick Moxon | Director | 12 Jul 1991 | 31 May 2002 | British | 90 years |
| Terrence George Mills | Director | 12 Jul 1991 | 7 Feb 2002 | British | 88 years |