| Alan Osborne | Director | 26 Jun 1992 | 30 Sept 1992 | British | 98 years |
| Alexander Roentgen | Director | 16 May 2005 | 30 Apr 2008 | German | 68 years |
| Alistair Cameron David Cumming | Director | 1 Oct 1997 | 29 Nov 1998 | British | 92 years |
| Andrew Charles Smith | Secretary | 26 Jun 1992 | 30 Mar 2001 | British | - |
| Andrew Christopher Bolter | Director | 3 Sept 2012 | 4 Apr 2014 | British | 56 years |
| Angela Claire Walker | Director | 15 Dec 2004 | 5 Nov 2007 | British | 64 years |
| Anthony John Collins | Director | 26 Jun 1992 | 11 Dec 1992 | British | 84 years |
| Anthony Keith Gill | Director | 26 Jun 1992 | 14 Mar 2000 | British | 96 years |
| Anthony Paul Bamford | Director | 26 Jun 1992 | 7 Jun 1994 | British | 81 years |
| Barry Myers | Director | 15 Feb 1996 | 7 Jun 1996 | British | 82 years |
| Bryan William Baker | Director | 26 Jun 1992 | 30 Nov 1992 | British | 94 years |
| Christopher Jonathan Bunker | Director | 15 Feb 1996 | 13 Mar 2000 | British | 80 years |
| Christopher Roger Ettrick Brooke | Director | 20 Apr 1994 | 29 Jul 1999 | British | 95 years |
| Clive Cadwgan James | Director | 15 Dec 2004 | 30 Apr 2009 | British | 78 years |
| David Connal Cather | Director | 13 Mar 2000 | 30 Sept 2006 | British | 67 years |
| David Maxwell Weston | Director | 2 Oct 2006 | 29 May 2009 | British | 68 years |
| Eric John Pountain | Director | 26 Jun 1992 | 28 Feb 1994 | British | 93 years |
| Fiona Puleston Penhallurick | Director | 4 Apr 2014 | 15 Mar 2016 | British | 59 years |
| Francis Keith John Jackson | Director | 13 Mar 2000 | 31 Mar 2005 | British | 77 years |
| George William Bolsover | Director | 27 Jan 2000 | 13 Mar 2000 | British | 76 years |
| Graham Samuel Greenhalgh | Director | 15 Dec 2004 | 31 Mar 2005 | British | 79 years |
| Guy Franklin Young | Director | 10 Apr 2012 | 31 Oct 2015 | South African | 57 years |
| Ian Gordon Sutherland Mcpherson | Director | 26 Jun 1992 | 31 Jan 1995 | British | 86 years |
| Jack Mawdsley | Director | 26 Jun 1992 | 30 Nov 1992 | British | 88 years |
| James Mcneilly Evans | Director | 13 Mar 2000 | 31 Dec 2003 | British | 85 years |
| James Richard Stirk | Secretary | 30 Mar 2001 | 30 Nov 2012 | British | - |
| Jean Paul Parayre | Director | 27 Sept 1994 | 29 Jul 1999 | French | 89 years |
| Jeremy David Hilliard | Director | 15 Dec 2004 | 16 May 2005 | British | 66 years |
| John David Lovering | Director | 8 Mar 1993 | 31 Aug 1995 | British | 77 years |
| John Ferguson Bowater | Director | 27 Jan 2000 | 3 Feb 2004 | British | 77 years |
| John Michael Middlecott Banham | Director | 1 Jul 1992 | 14 Mar 2000 | British | 86 years |
| John Richard Bradshaw | Secretary | 30 Nov 2012 | 30 Jun 2013 | British | - |
| John Tony Davies | Director | 15 Dec 2004 | 8 May 2009 | British | 71 years |
| Karim Hajjar | Director | 31 Mar 2005 | 21 Dec 2010 | British | 63 years |
| Kenneth Alfred Riley | Director | 13 Mar 2000 | 30 Nov 2002 | British | 85 years |
| Leslie Atkinson | Director | 14 Oct 1996 | 29 Jul 1999 | British | 82 years |
| Michael John Choules | Director | 12 Sept 2014 | 9 Apr 2021 | British | 66 years |
| Michael John Saunders | Director | 15 Dec 2004 | 31 Dec 2005 | British | 70 years |
| Neville Ian Simms | Director | 26 Jun 1992 | 29 Jul 1999 | British | 82 years |
| Patrick Michael Meaney | Director | 26 Jun 1992 | 16 Jul 1992 | British | 101 years |
| Paul Francis William Cottrell | Director | 21 Oct 2022 | 26 Jul 2024 | British | 60 years |
| Peter Beresford Rothwell | Director | 13 Mar 2000 | 29 Jun 2001 | British | 86 years |
| Peter Edward Whittle | Director | 15 Dec 2004 | 15 Oct 2007 | British | 74 years |
| Robert Ian Walter Boyd | Director | 15 Dec 2004 | 16 May 2005 | British | 81 years |
| Robert Sinclair Robertson | Director | 13 Mar 2000 | 15 Dec 2006 | British | 75 years |
| Roger Joseph Dickens | Director | 1 Oct 1998 | 14 Mar 2000 | British | 78 years |
| Roy James Harrison | Director | 1 Sept 1995 | 13 Mar 2000 | British | 79 years |
| Rupert Burne | Director | 1 Jan 2008 | 10 Apr 2012 | British | 63 years |
| Samuel Frank Pickstock | Director | 26 Jun 1992 | 31 Aug 1994 | British | 92 years |
| Terence Harold Mason | Director | 26 Jun 1992 | 4 Apr 1997 | British | 85 years |
| Terence Robert Last | Director | 15 Dec 2004 | 29 May 2009 | British | 76 years |
| Terence Robert Last | Director | 21 Dec 2010 | 7 Jan 2013 | British | 76 years |
| Timothy Conrad Langston Hall | Director | 15 Dec 2004 | 16 May 2005 | English | 73 years |