| Christopher Berriman Martin | Director | 27 Sept 1991 | 31 Oct 1995 | British | 73 years |
| Christopher Berriman Martin | Director | 20 Oct 1997 | 22 Jun 2000 | British | 73 years |
| Christopher John Harper | Director | 27 Sept 1991 | 26 May 1995 | British | 84 years |
| David Anthony Drake | Director | 27 Sept 1991 | 16 Oct 1991 | British | 91 years |
| David P Melles | Director | 26 May 1995 | 31 Dec 1997 | Canadian | 70 years |
| David Peter Timmins | Director | 23 Sept 2005 | 2 Apr 2007 | British | 73 years |
| Evans William Drayton | Director | 22 Nov 1993 | 26 May 1995 | British | 78 years |
| Evans William Drayton | Secretary | 27 Sept 1991 | 26 May 1995 | British | - |
| Frank Lauster | Director | 5 Feb 1998 | 21 Dec 1999 | German | 63 years |
| Ian David Mcdowell | Director | 27 Sept 1991 | 20 Oct 1997 | British | 94 years |
| Jack E Shelton | Director | 26 May 1995 | 22 Sept 1995 | American | 77 years |
| James O Weber | Director | 5 Sept 1995 | 21 Dec 1999 | American | 71 years |
| John Graham Worby | Director | 18 Feb 2009 | 1 Mar 2013 | British | 75 years |
| John Neil Foster Fairey | Director | 27 Sept 1991 | 26 May 1995 | British | 92 years |
| Karim Bitar | Director | 30 Sept 2011 | 13 Sept 2019 | American | 60 years |
| Martin Brett Boden | Director | 2 Apr 2007 | 26 Feb 2009 | British | 66 years |
| Nigel Brian Spicer | Director | 20 Dec 1999 | 28 Sept 2007 | British | 66 years |
| Nigel Brian Spicer | Secretary | 26 May 1995 | 28 Sept 2007 | British | - |
| Richard Kenneth Wood | Director | 23 Sept 2005 | 30 Sept 2011 | British | 81 years |
| Stephen John Amies | Director | 20 Dec 1999 | 1 Mar 2010 | British | 75 years |
| Stewart Alexander Rankin Proctor Crichton | Director | 28 Sept 2007 | 15 May 2013 | British | 74 years |
| Stewart Alexander Rankin Proctor Crichton | Secretary | 28 Sept 2007 | 15 May 2013 | British | - |
| William Henry Ives | Director | 27 Sept 1991 | 26 May 1995 | British | 94 years |