| Alastair Charles Mackenzie Pringle | Director | 26 Sept 1991 | 7 Dec 1994 | British | 82 years |
| Alexis John Lowth | Director | 19 May 2008 | 31 Aug 2010 | British | 54 years |
| Alison Buttery | Secretary | 18 Feb 2002 | 31 Jan 2003 | British | - |
| Carl Frederick Openshaw | Director | 26 Sept 1991 | 31 May 1995 | British | 87 years |
| David Anthony Sizer | Director | 26 Sept 1991 | 25 Feb 1998 | British | 86 years |
| Edward Thomas David Luker | Director | 13 Mar 2001 | 1 Dec 2009 | British | 76 years |
| Graham John Barnes | Director | 19 May 2015 | 12 Nov 2020 | British | 61 years |
| Hugh Vere Alexander Ellingham | Director | 26 Sept 1991 | 23 Jul 2003 | British | 68 years |
| John Alexander Smith | Director | 13 Mar 2001 | 31 Dec 2014 | British | 71 years |
| John Bayliss | Director | 1 Feb 1995 | 3 Jun 1998 | British | 91 years |
| John Michael Temple Slade | Director | 1 Feb 1995 | 30 Sept 1996 | British | 68 years |
| Malcolm Mcneil Wilson | Director | 26 Sept 1991 | 31 Dec 2008 | British | 75 years |
| Martin Sean Lewis | Director | 13 Dec 2011 | 7 Dec 2017 | British | 62 years |
| Martin Victor Lubieniecki | Director | 14 Jun 2002 | 19 May 2008 | British | 62 years |
| Martin Victor Lubieniecki | Secretary | 31 Jan 2003 | 17 Aug 2004 | British | - |
| Michael John Strong | Director | 1 Feb 1995 | 14 Nov 2001 | British | 78 years |
| Michael Thomas Fitzgerald | Director | 26 Sept 1991 | 30 Sept 1999 | British | 69 years |
| Noel George Herbert Manns | Director | 26 Sept 1991 | 5 Apr 1993 | British | 66 years |
| Paul Royston Robinson | Director | 18 Nov 2004 | 12 Nov 2020 | British | 63 years |
| Peter Aubrey Noble-jones | Director | 1 May 1993 | 19 Dec 1995 | British | 64 years |
| Peter Bowyer Allanson | Secretary | 26 Sept 1991 | 22 May 1996 | British | - |
| Peter Bowyer Allanson | Secretary | 20 Sept 2000 | 25 Jan 2002 | British | - |
| Philip John Cropper | Director | 18 Nov 2004 | 28 Feb 2018 | British | 66 years |
| Richard David Swaine | Director | 1 May 1993 | 15 Sept 1995 | British | 63 years |
| Valerie Anne Dickson | Secretary | 22 May 1996 | 20 Sept 2000 | British | - |