| Anthony Kavanagh | Director | 1 Sept 1996 | 31 Jul 2014 | British | 79 years |
| Claudio Ginella | Director | 17 Mar 2011 | 20 Oct 2014 | Swiss | 87 years |
| Colin Maclean Bather | Director | 15 Oct 1991 | 31 Dec 1991 | British | 93 years |
| Daniel John O'sullivan | Director | 15 Oct 1991 | 1 Apr 2003 | British | 88 years |
| Daniel John O'sullivan | Secretary | 15 Oct 1991 | 1 Apr 2003 | British | - |
| Filip Joseph Marcel Boyen | Director | 1 Aug 2013 | 31 Mar 2015 | Belgian | 68 years |
| Filip Joseph Marcel Boyen | Secretary | 1 Aug 2013 | 31 Mar 2015 | - | - |
| Francesco Dellepiane | Director | 8 Dec 1999 | 15 Jun 2018 | Italian | 99 years |
| Gary Edward Franklin | Director | 18 Dec 2009 | 2 Nov 2010 | British | 57 years |
| Hermann Jenny | Director | 15 Oct 1991 | 31 Dec 1991 | Swiss | 90 years |
| James Blair Sherwood | Director | 15 Oct 1991 | 5 Mar 2007 | American | 93 years |
| James Gavin Struthers | Director | 30 Apr 2001 | 7 Oct 2005 | British | 63 years |
| James Gavin Struthers | Secretary | 1 Apr 2003 | 7 Oct 2005 | British | - |
| Jonathan David Salter | Director | 31 Jul 2007 | 28 Aug 2009 | British | 59 years |
| Martin O'grady | Director | 8 Jul 2011 | 31 Dec 2019 | British | 63 years |
| Martin O'grady | Director | 1 Aug 2013 | 1 Aug 2013 | British | 63 years |
| Natale Rusconi | Director | 1 May 1996 | 1 Sept 1996 | Italian | 100 years |
| Nicholas Roger Varian | Director | 15 Oct 1991 | 26 Aug 2011 | British | 72 years |
| Paul Martin White | Director | 7 Oct 2005 | 8 Jul 2011 | British | 62 years |
| Paul Martin White | Secretary | 7 Oct 2005 | 8 Jul 2011 | British | - |
| Peter Parrott | Director | 15 Oct 1991 | 30 Apr 2001 | English | 92 years |
| Philip Alan Calvert | Secretary | 8 Jul 2011 | 1 Aug 2013 | - | - |
| Philip Alan Calvert | Director | 28 Aug 2009 | 1 Aug 2013 | British | 74 years |
| Richard Matthew Levine | Director | 11 Feb 2014 | 15 Jun 2018 | American | 65 years |
| Richard Matthew Levine | Director | 11 Feb 2014 | 11 Feb 2014 | American | 65 years |
| Simon Michael Cross Sherwood | Director | 18 Mar 1996 | 31 Jul 2007 | British | 66 years |
| Veronique Robin Amour | Director | 12 May 2020 | 5 Jun 2024 | French | 55 years |