| Alan Stephen Acheson | Director | 14 Jul 2016 | 8 Dec 2019 | British | 66 years |
| Andrea Russell Mcnee | Director | 1 Jan 1997 | 18 May 2000 | British | 65 years |
| Andrew Maule Dewar-durie | Director | 14 Feb 2001 | 15 Mar 2004 | British | 87 years |
| Andrew Scobbie | Director | 18 May 1989 | 31 Aug 1991 | British | 95 years |
| Aram Edward Shishmanian | Director | 4 Jan 2005 | 6 Sept 2005 | British | 75 years |
| Baron Anthony Webber Bernstein | Director | 24 Sept 1998 | 6 Dec 1999 | British | 88 years |
| Brendan Joseph Meehan | Director | 8 May 2007 | 1 May 2008 | British | 68 years |
| Brian Quinn | Director | 12 May 1998 | 15 Mar 2004 | British | 90 years |
| Bryan Henry Portman | Director | 12 Nov 2002 | 13 Aug 2003 | British | 78 years |
| Calum Alexander Macleod | Director | 18 May 1989 | 10 Aug 1993 | British | 91 years |
| Charles Milne Winter | Director | 1 Oct 1993 | 16 May 1996 | British | 93 years |
| Christina Ann Hankin | Secretary | 30 Apr 2015 | 29 Jan 2016 | - | - |
| Christopher James Fellingham | Director | 10 Feb 2010 | 31 Jul 2015 | British | 63 years |
| Christopher John Loraine Samuel | Director | 28 Oct 2009 | 1 Jul 2014 | British | 68 years |
| Christopher Thomas Demetriou | Director | 22 Nov 2021 | 1 Jun 2023 | British | 43 years |
| Claude Andre Chene | Director | 6 Oct 2011 | 1 Jul 2014 | British,american | 66 years |
| Clive Christopher Roger Bannister | Director | 2 Mar 2011 | 1 Jul 2014 | British | 68 years |
| Colin Martin Clark | Director | 1 Jul 2014 | 27 May 2016 | British | 67 years |
| Colin Richard Walklin | Director | 1 Jul 2014 | 27 May 2016 | British | 72 years |
| Daniel O'neil | Director | 18 May 1989 | 1 Aug 2008 | British | 66 years |
| David James Bruce Sutherland | Director | 16 Sept 1997 | 18 May 2000 | British | 77 years |
| David Philip Allvey | Director | 15 Mar 2004 | 6 Sept 2005 | British | 81 years |
| David Walter Watts | Director | 31 Oct 2013 | 1 Jul 2014 | British | 77 years |
| Deborah Anne Wagner | Secretary | 25 May 1993 | 20 Sept 2010 | British | - |
| Denise Elisabeth Thomas | Director | 22 Nov 2021 | 28 Sept 2023 | British | 55 years |
| Diarmuid Cummins | Director | 24 Jun 2010 | 31 Dec 2010 | British | 58 years |
| Douglas Ferrans | Director | 1 Oct 1997 | 31 May 2001 | British | 72 years |
| Edward Albert Charles Spencer-churchill | Director | 10 Sept 2008 | 2 Sept 2009 | British | 52 years |
| Eric St Clair Stobart | Director | 31 Oct 2013 | 1 Jul 2014 | British | 78 years |
| Fiona Jane Clutterbuck | Director | 23 Sept 2008 | 2 Sept 2009 | British | 68 years |
| Francis Michael Shaw | Director | 3 Jul 1990 | 31 Dec 1995 | British | 90 years |
| Francis William Ghiloni | Director | 16 May 2001 | 13 Apr 2004 | British | 66 years |
| Frederick William Crawley | Director | 18 May 1989 | 31 Dec 1989 | British | 100 years |
| Gavin Harry Laird | Director | 16 Aug 1996 | 14 Feb 2001 | British | 93 years |
| Gavin Macneill Stewart | Director | 16 Mar 1990 | 15 Jun 1994 | British | 67 years |
| Gavin Macneill Stewart | Director | 6 Jan 2003 | 14 Aug 2009 | British | 67 years |
| George Malcolm Williamson | Director | 15 Mar 2004 | 6 Sept 2005 | British | 87 years |
| Graham Lloyd Singleton | Director | 15 Mar 2004 | 6 Sept 2005 | British | 63 years |
| Harold Cottam | Director | 6 Dec 1999 | 30 Sept 2004 | British | 88 years |
| Holly Sylvia Kidd | Secretary | 29 Jan 2016 | 19 Nov 2020 | - | - |
| Ian C Adam | Director | 28 Nov 2000 | 14 Mar 2001 | British | 83 years |
| Ian John Paterson Brown | Director | 6 Nov 2006 | 29 Jun 2012 | British | 72 years |
| Ian Matthew Campbell | Director | 18 May 1989 | 30 Jun 1989 | British | 74 years |
| James Allen Newman | Director | 8 May 2007 | 1 May 2008 | British | 62 years |
| James Baird Aird | Director | 1 Jul 2014 | 22 Nov 2021 | British | 66 years |
| James Mcconville | Director | 28 Jun 2012 | 1 Jul 2014 | British | 70 years |
| John Edward Heaps | Director | 10 Aug 1993 | 24 Feb 1999 | British | 87 years |
| John Robert Cusins | Director | 6 Jun 2008 | 2 Sept 2009 | British | 54 years |
| John Wilson | Secretary | 18 May 1989 | 25 May 1993 | British | - |
| Jonathan Charles Polin | Director | 1 Oct 2004 | 17 Jun 2011 | British | 67 years |
| Jonathan James Yates | Director | 23 Sept 2010 | 21 Dec 2011 | British | 65 years |
| Jonathan Stephen Moss | Director | 12 Jun 2008 | 28 Nov 2008 | British | 63 years |
| Jonathan Stephen Moss | Director | 27 Jan 2010 | 7 Feb 2011 | British | 63 years |
| Layton Gwyn Tamberlin | Director | 12 Jun 2008 | 4 Jun 2009 | English | 50 years |
| Leslie Kynoch Mcintosh | Director | 1 Jan 1997 | 26 May 2004 | British | 72 years |
| Margaret Mclaren | Director | 1 Jan 1997 | 18 May 2000 | British | 64 years |
| Maria Luisa Cassoni | Director | 6 Dec 1999 | 31 Dec 2000 | British | 75 years |
| Matthew Dean Goodwin | Director | 18 May 1989 | 31 Dec 1989 | British | 97 years |
| Michael Nicholas Biggs | Director | 6 Sept 2005 | 1 May 2008 | British | 74 years |
| Neil Andrew Slater | Director | 22 Nov 2021 | 28 Sept 2023 | British | 49 years |
| Norman Keith Skeoch | Director | 1 Jul 2014 | 26 Oct 2015 | British | 70 years |
| Paul Andrew Thompson | Director | 13 Aug 2003 | 7 Mar 2007 | British | 64 years |
| Paul Lewis Miles | Director | 16 Mar 2012 | 19 Dec 2012 | British | 55 years |
| Paul Robert Dixon | Director | 16 Oct 2009 | 7 May 2010 | British | 60 years |
| Paul Spencer | Director | 15 Mar 2004 | 6 Sept 2005 | British | 76 years |
| Peter Smith Reid | Director | 1 Jan 1997 | 28 Apr 2010 | British | 63 years |
| Peter Vincent Burdon | Director | 18 May 1989 | 6 Mar 1996 | British | 79 years |
| Richard Chalmers Gordon Fortin | Director | 23 Jan 2001 | 22 Apr 2004 | British | 85 years |
| Robert Derek Cook | Director | 16 Oct 2009 | 3 Feb 2010 | British | 57 years |
| Roderick Louis Paris | Director | 1 Jul 2014 | 27 May 2016 | British | 67 years |
| Sean Andrew Fitzgerald | Director | 1 Apr 2016 | 28 Oct 2018 | British | 61 years |
| Simon Andrew Emile Winter | Director | 11 Jan 2019 | 22 Nov 2021 | British | 51 years |
| Stephanie Rose Griffin | Secretary | 20 Sept 2010 | 30 Apr 2015 | - | - |
| Timothy Henry Raynes Roberts | Director | 10 Feb 2010 | 29 Jan 2013 | British | 59 years |
| Tom Cross Brown | Director | 17 Jun 2008 | 1 Apr 2010 | English | 79 years |
| Trevor John Bayley | Director | 3 Jul 1990 | 21 Nov 2000 | British | 75 years |
| William Alan Mcintosh | Director | 7 Jul 2008 | 20 Aug 2008 | British | 59 years |
| William Raymond Treen | Director | 6 Jun 2008 | 2 Sept 2009 | Welsh | 86 years |