| Adrian John Gunson | Director | 19 Feb 1993 | 31 Jul 1997 | English | 87 years |
| Alain Henri Pierre Dromer | Director | 25 Sept 2007 | 31 May 2012 | French | 72 years |
| Alan Gadd | Director | 20 Feb 2003 | 3 Jun 2005 | British | 66 years |
| Alistair Dougal Morrison | Director | 20 Feb 2003 | 26 Aug 2005 | British | 70 years |
| Christopher Miles Oglethorpe | Director | 10 Oct 2005 | 30 Jan 2009 | British | 57 years |
| Clifford James Abrahams | Director | 6 Jul 2015 | 31 Dec 2015 | British | 59 years |
| Daron James Pearce | Director | 30 Jul 1998 | 9 Feb 2000 | British | 62 years |
| David Ernest Parker | Secretary | 1 Aug 1994 | 18 Mar 1999 | British | - |
| David Kenneth Watson | Director | 16 Dec 2003 | 28 Aug 2007 | British | 67 years |
| David Rowlinson | Director | 3 Apr 1996 | 9 Oct 2000 | British | 69 years |
| David Tremblay | Director | 25 Feb 2002 | 4 Feb 2003 | British | 70 years |
| Dean Stannard | Director | 25 Feb 2002 | 30 Apr 2004 | British | 60 years |
| Emily Cherry Bishop | Director | 19 Feb 1993 | 7 Apr 2000 | British | 80 years |
| Eric Michael Sandland | Director | 19 Feb 1993 | 30 Sept 1994 | British | 88 years |
| Euan George Munro | Director | 13 Jan 2014 | 16 Mar 2016 | British | 56 years |
| Gerald Hubert Holtham | Director | 9 Oct 2000 | 24 Mar 2004 | British | 82 years |
| Gillian Barbara Cass | Director | 15 Mar 2016 | 8 Feb 2017 | British | 50 years |
| Ian Bryan Womack | Director | 30 Jul 1997 | 25 Feb 2002 | British | 73 years |
| Ian Bryan Womack | Director | 20 Feb 2003 | 31 Dec 2008 | British | 73 years |
| Ian Bryan Womack | Director | 21 Aug 2013 | 30 Jun 2015 | British | 73 years |
| James Anthony Heyworth-dunne | Director | 1 Nov 1995 | 31 Oct 1999 | British | 82 years |
| James Leonard Tanner | Director | 12 Apr 2005 | 29 Feb 2008 | British | 66 years |
| Jan Nuttall | Director | 3 Oct 2001 | 30 Jun 2005 | British | 69 years |
| John Gordon Hodgson | Director | 20 Apr 2009 | 31 May 2013 | British | 66 years |
| Katherine Lucy Garrett-cox | Director | 31 Mar 2004 | 28 Feb 2007 | British | 59 years |
| Keith Jones | Director | 21 Oct 1999 | 31 Dec 2006 | British | 74 years |
| Linda Woolterton | Director | 1 Jan 1999 | 9 Oct 2000 | British | 69 years |
| Malcolm John Le May | Director | 2 Oct 2001 | 10 Jan 2003 | British | 68 years |
| Martin Alexander Hall | Director | 30 Jul 1998 | 31 Aug 2001 | British | 67 years |
| Mary Elizabeth Ward | Secretary | 19 Mar 1999 | 8 Sept 2000 | British | - |
| Matthew Adam Atkinson | Director | 13 Jul 2017 | 31 Jul 2018 | British | 41 years |
| Maurice Gerard Quirke | Director | 25 Feb 2002 | 16 Dec 2003 | British | 66 years |
| Michael David Oxbury | Secretary | 19 Feb 1993 | 31 Jul 1994 | British | - |
| Michael James Wentworth Waites | Director | 19 Feb 1993 | 4 Dec 1998 | British | 72 years |
| Michael John Bishop | Director | 31 Jul 1998 | 9 Oct 2000 | British | 76 years |
| Michael Nicholas Biggs | Director | 1 Jan 1999 | 9 Oct 2000 | British | 74 years |
| Nicholas David Alford | Director | 1 Sept 2003 | 29 Apr 2008 | British | 72 years |
| Nicholas John Price | Director | 19 Feb 1993 | 31 Dec 1997 | British | 83 years |
| Olga Yevmenchikova | Director | 6 Feb 2017 | 27 Aug 2018 | British | 50 years |
| Patrick John Neville | Director | 2 Aug 2011 | 30 Jun 2015 | British | 66 years |
| Paul Andrew Abberley | Director | 21 Jan 2009 | 20 Nov 2013 | British | 67 years |
| Peter Colin Frank Haynes | Director | 9 Oct 2000 | 19 Nov 2001 | British | 72 years |
| Peter Frederick Baynham | Director | 10 Aug 1994 | 28 Feb 1999 | British | 73 years |
| Philip Gordon Scott | Director | 19 Feb 1993 | 13 Aug 1993 | British | 72 years |
| Philip Gordon Scott | Director | 16 Mar 2007 | 8 Nov 2007 | British | 72 years |
| Philip Johnson Twyman | Director | 25 Feb 2002 | 31 Mar 2004 | Australian | 82 years |
| Raoul Philip Gustav Bachman | Director | 20 Feb 2003 | 31 Aug 2003 | Swiss | 64 years |
| Richard John Harvey | Director | 14 Aug 1993 | 9 Oct 2000 | British | 76 years |
| Richard Julian Field | Director | 24 Jul 2013 | 30 Apr 2014 | British | 63 years |
| Sarah Jane Williams | Director | 20 Jul 2018 | 24 Jan 2019 | British | 44 years |
| Shirley Jill Garrood | Director | 9 Oct 2000 | 17 Apr 2001 | British | 69 years |
| Simon Joshua Dowie | Director | 2 Feb 2018 | 31 Jul 2018 | British | 57 years |
| Siobhan Geraldine Boylan | Director | 25 Sept 2007 | 27 May 2011 | British | 57 years |
| Thomas Howard | Director | 15 Mar 2016 | 2 Feb 2018 | Irish | 49 years |