| Andrew Christopher Bolter | Director | 13 Jan 2014 | 4 Apr 2014 | British | 56 years |
| Bruno Marie Joseph Philippe Lafont | Director | 9 Dec 1997 | 4 Sept 1998 | French | 70 years |
| Christopher Charles Fraser Laidlaw | Director | 30 May 1992 | 27 Aug 1992 | British | 104 years |
| Christopher Gareth Morgan | Director | 8 Jul 2002 | 28 Feb 2007 | British | 69 years |
| Clive Jonathan Mottram | Director | 15 Jun 2009 | 2 Jun 2010 | British | 67 years |
| Colin Ross Corness | Director | 30 May 1992 | 25 May 1995 | British | 95 years |
| Deborah Grimason | Director | 13 Apr 2007 | 19 Jun 2009 | British | 63 years |
| Deborah Grimason | Director | 1 Jan 2012 | 20 Nov 2013 | British | 63 years |
| Donal Richard William Young | Director | 1 May 1995 | 28 Feb 1998 | British | 87 years |
| Dorothy Ruth Taylor | Director | 30 Mar 2007 | 31 May 2012 | British | 73 years |
| Dyfrig Morgan James | Director | 4 Apr 2003 | 25 Feb 2009 | British | 72 years |
| Edmund John Phillip Browne | Director | 1 Jan 1993 | 12 Jul 1996 | British | 78 years |
| Fiona Puleston Penhallurick | Director | 4 Apr 2014 | 15 Mar 2016 | British | 59 years |
| George Richard Phillipson | Director | 30 May 1992 | 16 Dec 1997 | British | 87 years |
| Gerald Michael Nolan Corbett | Director | 30 May 1992 | 1 Apr 1994 | British | 75 years |
| Guy Franklin Young | Director | 13 Jan 2014 | 31 Oct 2015 | South African | 57 years |
| Helga Bruhn-braas | Director | 27 Nov 1996 | 4 Nov 1997 | German | 83 years |
| Ian Maclean Reid | Director | 4 Sept 1998 | 4 Apr 2003 | British | 81 years |
| James David Francis Barnes | Director | 1 Mar 1994 | 9 Dec 1997 | British | 90 years |
| James White | Director | 30 May 1992 | 26 May 1994 | British | 89 years |
| Jean Pierre Cloiseau | Director | 4 Sept 1998 | 5 May 2006 | French | 82 years |
| John Pix Weston | Director | 20 May 1997 | 9 Dec 1997 | British | 75 years |
| John Walter Murray Wallace | Director | 30 May 1992 | 31 Dec 1993 | British | 96 years |
| Kevin Allan Abbott | Director | 30 May 1992 | 31 Dec 1994 | British | 72 years |
| Louis Leslie Alexander Eperjesi | Director | 20 Mar 2000 | 30 Apr 2002 | Canadian | 64 years |
| Marie-cecile Collignon | Director | 1 Sept 2011 | 31 Dec 2011 | French | 50 years |
| Michael John Choules | Director | 12 Sept 2014 | 9 Apr 2021 | British | 66 years |
| Michael William Penny | Director | 4 Sept 1998 | 20 Mar 2000 | British | 76 years |
| Norbert Albert Erich Gerlach | Director | 27 Nov 1996 | 9 Dec 1997 | German | 86 years |
| Olivier Luneau | Director | 9 Dec 1997 | 18 Sept 1998 | French | 78 years |
| Patrice Boubee | Director | 4 Sept 1998 | 5 May 2006 | French | 79 years |
| Patrice Marie Michel Tourliere | Director | 4 Sept 1998 | 1 Mar 2009 | French | 72 years |
| Paul Francis William Cottrell | Director | 21 Nov 2022 | 26 Jul 2024 | British | 60 years |
| Paul William Hewitt | Director | 25 Jul 1994 | 9 Dec 1997 | British | 70 years |
| Peter Michael Johnson | Director | 30 May 1992 | 30 Apr 1996 | British | 79 years |
| Peter William Joseph Mills | Director | 1 Sept 2003 | 30 Jun 2010 | British | 73 years |
| Phillip Thomas Edward Lanyon | Director | 16 Aug 2010 | 13 Jan 2014 | British | 62 years |
| Raymond Alfred Elliott | Director | 10 May 2006 | 13 Apr 2007 | British | 79 years |
| Rebecca Joan Powell | Director | 5 Jan 2011 | 1 Sept 2011 | British | 54 years |
| Richard Welch Pogue | Director | 30 May 1992 | 9 Dec 1997 | Us Citizen | 98 years |
| Richard William Heley | Director | 9 Dec 1997 | 16 Sept 1998 | British | 78 years |
| Robert Stewart Napier | Director | 30 May 1992 | 9 Dec 1997 | British | 79 years |
| Robin Adair Biggam | Director | 30 May 1992 | 9 Dec 1997 | British | 88 years |
| Robin Leigh Pemberton | Director | 1 Oct 1993 | 9 Dec 1997 | British | 99 years |
| Rosalind Hedley-miler | Director | 9 Dec 1997 | 16 Sept 1998 | British | 72 years |
| Rudolph Joseph Ion Agnew | Director | 1 Feb 1995 | 9 Dec 1997 | British | 92 years |
| Sonia Fennell | Director | 7 Jun 2010 | 5 Jan 2011 | British | 67 years |
| Stephen Rothwell O'brien | Secretary | 30 May 1992 | 31 Mar 1998 | British | - |
| William Scott Yearsley | Director | 27 Mar 1997 | 12 Jan 1998 | American | 72 years |