| Alan Goldsmith | Director | 20 Mar 1998 | 1 Apr 1999 | British | 78 years |
| Alan John Davies | Director | 26 Feb 1996 | 25 Mar 1998 | British | 72 years |
| Anthony Edward Vicars-miles | Director | 11 Oct 1992 | 31 May 1993 | British | 91 years |
| Catherine Lynne Williams | Director | 8 Aug 2001 | 31 Jan 2003 | Canadian | 76 years |
| David Richmond Thomson | Director | 11 Oct 1992 | 12 Jan 1993 | British | 92 years |
| David Robert Varney | Director | 26 Feb 1996 | 10 May 1996 | British | 80 years |
| Diane June Penfold | Secretary | 11 Oct 1992 | 30 Sept 1994 | British | - |
| Dipa Raivadera | Secretary | 3 Oct 1994 | 26 Nov 1997 | British | - |
| Gyorgy Imre Mosonyi | Director | 14 Jan 1997 | 10 Mar 1998 | Hungarian | 77 years |
| Ian Morris Williams | Director | 22 Mar 2005 | 24 Mar 2006 | British | 61 years |
| Irenaeus Gerardus Maria Verbruggen | Director | 22 Nov 1998 | 30 Jun 2000 | Dutch | 67 years |
| Jacek Jan Dziembaj | Director | 19 Feb 2003 | 18 May 2011 | Poland | 58 years |
| Johan Gerard Drechsel | Director | 14 Dec 1993 | 14 Jan 1997 | Dutch | 71 years |
| Johannes Wilco Smits | Director | 22 Oct 1993 | 22 Nov 1993 | British | 74 years |
| John James Barry | Director | 31 Mar 2003 | 31 Aug 2004 | British | 67 years |
| Jose Augusto Henriques Guimaraes | Director | 6 Apr 1997 | 15 Jul 1999 | Portuguese | 87 years |
| Konstantin Andreevsky | Director | 10 Oct 2005 | 1 Jan 2012 | Russian | 59 years |
| Kurt Doehmel | Director | 14 Jan 1997 | 12 Apr 2002 | German | 78 years |
| Lee Humphries | Director | 28 Jun 2000 | 1 May 2005 | British | 68 years |
| Marina Verstakova | Director | 1 Jan 2012 | 19 Dec 2012 | Russian | 53 years |
| Marinus Lek | Director | 25 Nov 1997 | 22 Nov 1998 | Dutch | 64 years |
| Michael Colin Harrop | Director | 3 Feb 2003 | 1 Sept 2007 | British | 69 years |
| Michael James Daman | Director | 9 Jan 2004 | 31 Jan 2005 | British | 71 years |
| Michael Stuart Mackie | Director | 2 Mar 1995 | 4 Nov 1997 | British | 76 years |
| Neil Arthur Cordey | Director | 21 Jul 1997 | 7 Aug 2001 | British | 73 years |
| Paul Robinson | Director | 3 Mar 2014 | 17 Aug 2017 | British | 55 years |
| Philip Thomas Edward Sanderson | Director | 1 Sept 2007 | 17 Aug 2017 | British | 57 years |
| Rein Gerard Tamboezer | Director | 9 May 2001 | 31 Mar 2003 | Dutch | 79 years |
| Rene Van Rooij | Director | 20 Mar 1998 | 16 Oct 2003 | Dutch | 79 years |
| Richard Clive Mann | Director | 31 Oct 1995 | 5 Apr 1997 | British | 77 years |
| Roger James Mills-hicks | Director | 11 Oct 1992 | 22 Oct 1993 | British | 78 years |
| Rupert Michael Cox | Director | 11 Oct 1992 | 26 Feb 1996 | British | 82 years |
| Sergio Goloubeff | Director | 22 Oct 1993 | 1 Nov 1995 | Brazilian | 87 years |
| Steven Mark Devon | Director | 17 Jan 2000 | 7 Feb 2003 | British | 70 years |
| Vagn Nedergaard Hansen | Director | 12 Apr 2002 | 7 Nov 2003 | Denmark | 74 years |
| Veronica Alison Carter | Director | 22 Oct 1993 | 21 Dec 1995 | British | 76 years |
| William Adrian Loader | Director | 1 Jun 1993 | 21 Dec 1995 | British | 78 years |
| William Grant Bowie | Director | 24 Apr 1997 | 31 Dec 2001 | British | 78 years |
| William Kozik | Director | 12 May 2011 | 8 Aug 2017 | Polish | 60 years |