| Adrian Thomas Grace | Director | 29 Sept 2009 | 23 Nov 2011 | British | 63 years |
| Alan James Oddie | Director | 25 Jun 1996 | 31 Jan 2000 | British | 76 years |
| Andrew Moss | Director | 11 Apr 2022 | 31 Dec 2022 | British | 62 years |
| Andrew Seaton Birrell | Director | 2 Apr 2012 | 6 Jan 2016 | British,south African | 57 years |
| Brid Mary Meaney | Director | 31 Dec 2022 | 23 Aug 2024 | Irish | 52 years |
| Caroline Mary Burton | Director | 31 May 1992 | 9 Aug 1999 | British | 76 years |
| Charles Martin Garthwaite | Director | 9 Jul 2010 | 23 Nov 2011 | British | 61 years |
| Christopher William Chapman | Director | 23 Nov 2011 | 5 Mar 2012 | United States | 65 years |
| Clare Bousfield | Director | 11 Nov 2010 | 23 Nov 2011 | British | 58 years |
| David Aiken Elston | Secretary | 1 Jul 2010 | 24 Sept 2010 | British | - |
| David Alexander Henderson | Director | 7 Oct 1999 | 31 Dec 2004 | British | 82 years |
| David Robert Meldrum | Director | 27 Jul 1992 | 31 Jul 1996 | British | 85 years |
| David Victor Paige | Director | 1 May 2008 | 23 Nov 2011 | British | 75 years |
| Erik Lagendijk | Director | 11 Nov 2010 | 23 Nov 2011 | Dutch | 66 years |
| Feilim Mackle | Director | 7 Dec 2007 | 29 Mar 2010 | Irish | 59 years |
| Geoffrey Charles Nunn | Director | 31 May 1992 | 30 Sept 1997 | British | 93 years |
| Graham William Dumble | Director | 31 Dec 2003 | 9 Nov 2007 | British | 67 years |
| Gregory Mark Wood | Director | 9 Aug 1999 | 7 Oct 1999 | British | 73 years |
| Ian Bruce Owen | Director | 23 Nov 2011 | 6 Jan 2016 | British | 73 years |
| Ian Gordon Young | Secretary | 7 Oct 1999 | 13 Aug 2009 | British | - |
| Ian William James Patrick | Director | 6 Jan 2016 | 28 May 2020 | British | 59 years |
| James Kenneth Mackenzie | Secretary | 24 Sept 2010 | 23 Nov 2011 | British | - |
| James Mcconville | Director | 11 May 2011 | 23 Nov 2011 | British | 70 years |
| James Morley | Director | 31 May 1992 | 25 Jun 1996 | United Kingdom | 77 years |
| James Thomas Mcdonough | Director | 31 May 1992 | 31 May 1995 | British | 93 years |
| Jan Jarich Nooitgedagt | Director | 1 Jul 2010 | 23 Nov 2011 | Dutch | 73 years |
| Janet Elizabeth Wyles | Director | 22 Feb 2006 | 12 Jun 2006 | British | 62 years |
| John Leonard Wybrew | Director | 6 Sept 2012 | 8 May 2015 | British | 83 years |
| John Mark Laidlaw | Director | 1 Jan 2005 | 21 Jun 2010 | British | 60 years |
| John Reginald William Clayton | Secretary | 31 May 1992 | 7 Oct 1999 | British | - |
| John Sinclair | Director | 31 May 1992 | 5 May 1999 | British | 78 years |
| John William King | Director | 31 May 1992 | 30 Nov 1994 | British | 83 years |
| Jonathan Yates | Director | 1 Mar 2012 | 7 May 2015 | British | 65 years |
| Lorraine May Blair | Secretary | 5 Sept 2013 | 8 May 2015 | British | - |
| Matthew Hilmar Cuhls | Director | 6 Jan 2016 | 12 Apr 2022 | British | 52 years |
| Maurice Clive Brunet | Director | 22 Feb 2006 | 15 Feb 2010 | British | 68 years |
| Maxwell Colin Bernard Ward | Director | 1 Jul 2010 | 4 May 2011 | British | 77 years |
| Michael Charles Woodcock | Director | 6 Jan 2016 | 12 Apr 2022 | British | 58 years |
| Michael Ralph Tuohy | Director | 5 Aug 2008 | 23 Nov 2011 | British | 84 years |
| Michel Joachim Tilmant | Director | 1 Apr 2013 | 8 May 2015 | Belgian | 74 years |
| Otto Thoresen | Director | 7 Oct 1999 | 31 Mar 2011 | British | 70 years |
| Patrick Nigel Christopher Gale | Director | 15 Feb 2010 | 24 Oct 2011 | British | 66 years |
| Patrick Peugeot | Director | 1 Jul 2010 | 23 Nov 2011 | French | 89 years |
| Paul Shakespeare | Secretary | 6 Jan 2016 | 22 Jul 2020 | - | - |
| Peter Gordon Dornan | Director | 2 Aug 2001 | 14 Nov 2003 | British | 71 years |
| Peter Gordon Dornan | Director | 22 Feb 2006 | 7 Dec 2007 | British | 71 years |
| Roy Charles Gillson | Director | 30 Jun 2011 | 23 Nov 2011 | British | 74 years |
| Roy Patrick | Director | 7 Oct 1999 | 28 Apr 2006 | British | 76 years |
| Simon Anthony John Davis | Secretary | 23 Nov 2011 | 5 Sept 2013 | British | - |
| Stephen James Groves | Director | 23 Nov 2011 | 6 Jan 2016 | British | 51 years |
| Steven Charles Clode | Director | 3 Jun 2008 | 15 Feb 2010 | British | 66 years |
| Stuart Turner Brown | Secretary | 8 May 2015 | 6 Jan 2016 | - | - |
| Thomas Martin O'connell | Director | 31 May 1992 | 30 Jun 1999 | British | 77 years |
| Timothy Richard Lloyd-williams | Director | 31 May 1992 | 27 Jul 1992 | British | 90 years |
| William John Robertson | Director | 30 Jan 2001 | 31 Dec 2004 | British | 73 years |
| William John Robertson | Director | 15 Feb 2010 | 30 Jul 2010 | British | 73 years |
| William Mervyn Frew Carey Shannon | Director | 1 Jul 2010 | 23 Nov 2011 | British | 77 years |
| William Wilson Stewart | Director | 7 Oct 1999 | 31 May 2001 | British | 85 years |