| Alan Howard Watkins | Director | 1 Mar 1993 | 1 Aug 1994 | British | 80 years |
| Allan William Anderson | Director | 26 Sept 1994 | 26 Oct 1994 | British | 67 years |
| Deirdre Mary Alison Watson | Secretary | 1 Mar 1993 | 26 Oct 1994 | British | - |
| Edward James Ellwood | Director | 1 Aug 1994 | 26 Oct 1994 | British | 78 years |
| Ervin Landau | Director | 15 Aug 1996 | 26 Aug 1996 | British | 90 years |
| Graeme Bissett | Director | 11 Jan 1999 | 25 Apr 2001 | British | 68 years |
| Graham Lawrence Footitt | Director | 1 Mar 1993 | 26 Oct 1994 | British | 84 years |
| Ian Ellis Fraser | Director | 19 Sept 2005 | 1 Jul 2011 | Uk | 69 years |
| Ian Vincent Ellis | Secretary | 15 Jul 2011 | 1 Jan 2021 | British | - |
| John Duncan Hastie | Director | 1 Aug 1994 | 26 Oct 1994 | British | 82 years |
| John Mclellan Houston | Director | 26 Oct 1994 | 28 Mar 2000 | British | 82 years |
| Kazushi Ogura | Director | 15 Jul 2011 | 1 Mar 2014 | Japanese | 53 years |
| Kenji Murai | Director | 15 Jul 2011 | 1 Feb 2018 | Japanese | 60 years |
| Kenneth Andrew Mcgill | Director | 25 Apr 2001 | 1 Nov 2002 | British | 68 years |
| Kenneth Andrew Mcgill | Director | 22 Jul 2004 | 28 Mar 2006 | British | 68 years |
| Kenneth Andrew Mcgill | Secretary | 1 Jul 1996 | 22 Jul 2004 | British | - |
| Mark Richard Slade | Director | 1 Mar 2014 | 1 Feb 2018 | British | 51 years |
| Mark Richard Slade | Director | 1 Feb 2018 | 1 Apr 2019 | British | 51 years |
| Michael Joseph Anthony Healy | Director | 28 Mar 2006 | 1 Jul 2011 | British | 66 years |
| Michael Joseph Anthony Healy | Secretary | 22 Jun 2006 | 1 Jul 2011 | British | - |
| Robert Huthersall | Director | 30 Mar 2000 | 25 Apr 2001 | British | 79 years |
| Robert Huthersall | Secretary | 26 Oct 1994 | 1 Jul 1996 | British | - |
| Scott Morrison | Secretary | 22 Jul 2004 | 22 Jun 2006 | British | - |
| Stanley Hart Owens | Director | 25 Apr 2001 | 25 Nov 2002 | American | 78 years |
| Thomas Farmer | Director | 26 Oct 1994 | 8 Jan 1999 | British | 86 years |
| Thomas Richard Duncan Reid | Director | 1 Mar 1993 | 26 Oct 1994 | British | 82 years |
| Timothy Charles Parker | Director | 14 Nov 2002 | 23 Mar 2005 | British | 71 years |
| William Martin Smith | Director | 29 Dec 1994 | 6 Jan 1995 | British | 82 years |