| Alan John White | Director | 23 Oct 1992 | 25 Apr 1994 | British | 77 years |
| Amy Nauiokas | Director | 31 Aug 2006 | 6 May 2008 | American | 54 years |
| Christopher Hayward | Director | 7 Jan 1999 | 11 Jan 2000 | British | 66 years |
| Christopher Lambert | Director | 23 Oct 1992 | 25 Mar 1996 | British | 74 years |
| Craig Walling | Director | 16 Aug 2001 | 31 Jan 2003 | Usa | 74 years |
| David Charles Ian Harding | Director | 1 Feb 1996 | 31 Jul 1998 | British | 70 years |
| David Leighton Jones | Director | 23 Oct 1992 | 31 Dec 1997 | British | 73 years |
| David Mclean Currie | Director | 9 Nov 2010 | 15 Feb 2016 | British | 55 years |
| Declan Paul Vaughan | Director | 25 Apr 1994 | 31 Mar 1996 | British | 63 years |
| Desmond Gerard Byrne | Director | 4 Sept 2008 | 25 Jan 2012 | British | 66 years |
| Donald William Sherret Reid | Director | 30 Apr 2003 | 12 Dec 2006 | British | 67 years |
| Fiona Helen Elbourne | Director | 3 Aug 2010 | 27 Jul 2011 | British | 65 years |
| Fiona Hulme | Director | 25 Apr 1994 | 29 Feb 1996 | British | 69 years |
| Graham Hood Simpson | Director | 24 May 1995 | 31 Mar 1996 | British | 71 years |
| Guy James Knight | Director | 26 Feb 1996 | 11 Jan 2000 | British | 68 years |
| John Howard Preece | Secretary | 1 Jan 1997 | 13 Jul 2001 | British | - |
| John Thomas Gardner | Director | 12 Sept 2000 | 31 Jan 2003 | American | 67 years |
| Joseph R Martinetto | Director | 7 Jan 1999 | 31 Jan 2003 | Usa | 64 years |
| Julian Richard Henwood | Secretary | 13 Jul 2001 | 31 Jan 2003 | British | - |
| Kenneth George Bull | Director | 23 Oct 1992 | 31 Dec 1996 | English | 82 years |
| Kenneth George Bull | Secretary | 23 Oct 1992 | 31 Dec 1996 | English | - |
| Malcolm David Macallan | Director | 24 Sept 2003 | 27 Feb 2007 | British | 68 years |
| Malcolm Holdsworth | Director | 25 Apr 1994 | 25 Mar 1996 | British | 78 years |
| Martin William Lambert | Director | 23 Oct 1992 | 31 Mar 1996 | British | 74 years |
| Nigel Vardon Bartram | Director | 25 Jun 1993 | 31 Mar 1995 | British | 73 years |
| Paul Howard Burd | Director | 23 Sept 2013 | 22 Jun 2016 | British | 65 years |
| Paul Leslie White Chapman | Director | 27 Jul 2011 | 20 Nov 2013 | British | 61 years |
| Peter Lindop Hall | Director | 31 Jan 2003 | 28 Feb 2006 | British | 62 years |
| Philip Andrew Northey | Director | 30 Nov 2006 | 15 Oct 2007 | British | 58 years |
| Ramsay Alexander Urquhart | Director | 20 Apr 2007 | 31 May 2010 | British | 61 years |
| Robert Duste | Director | 7 Jan 1999 | 16 Aug 2001 | Us | 70 years |
| Ronald Edward Lay | Director | 19 Mar 2007 | 17 Jul 2007 | American | 65 years |
| Simon John Weld | Director | 16 Jun 2004 | 1 Sept 2010 | British | 62 years |
| Susan Anne Concannon | Director | 23 Oct 1992 | 17 Jan 1997 | British | 71 years |
| Thomas James Whittaker | Director | 7 Jan 1999 | 30 Apr 2003 | British | 70 years |
| Timothy Francis Mccarthy | Director | 10 Sept 1996 | 7 Apr 1998 | American | 75 years |