| David John Atkins | Director | 8 Oct 2008 | 2 Nov 2020 | British | 60 years |
| Gerard Devaux | Director | 1 Oct 1999 | 8 Sept 2008 | French | 78 years |
| Hans Rainer Vogt | Director | 25 Apr 1992 | 31 Dec 1999 | British | 83 years |
| James Alan Lenton | Director | 30 Oct 2019 | 26 Apr 2021 | British | 51 years |
| James Henry Riddell | Director | 25 Apr 1992 | 22 May 1995 | British | 76 years |
| John Andrew Bywater | Director | 25 Jun 1998 | 31 Mar 2007 | British | 79 years |
| John Richard Parry | Director | 25 Apr 1992 | 14 Jun 1993 | British | 92 years |
| Jonathan Michael Douglas Scott | Director | 18 Dec 1992 | 12 Aug 1993 | British | 80 years |
| Mark Richard Bourgeois | Director | 17 Mar 2017 | 11 Nov 2021 | British | 58 years |
| Martin Plocica | Director | 23 Oct 2012 | 17 Mar 2017 | American | 64 years |
| Nicholas Timon Drakesmith | Director | 30 Jun 2011 | 1 Oct 2019 | British | 61 years |
| Peter William Beaumont Cole | Director | 21 Jan 1993 | 30 Apr 2019 | British | 67 years |
| Robert John Godwin Richards | Director | 18 Dec 1992 | 30 Sept 2009 | British | 70 years |
| Ronald Richard Spinney | Director | 25 Jun 1998 | 30 Sept 1999 | British | 85 years |
| Roy Sidney Johnson | Director | 14 Jun 1993 | 31 Dec 1995 | British | 89 years |
| Roy Sidney Johnson | Secretary | 25 Apr 1992 | 2 Nov 1993 | British | - |
| Simon Richard Melliss | Director | 22 May 1995 | 30 Jun 2011 | British | 74 years |
| Stuart John Haydon | Secretary | 2 Nov 1993 | 22 Sept 2011 | British | - |
| Sydney Mason | Director | 25 Apr 1992 | 14 Jun 1993 | British | 106 years |