| Andrew Charles Stent Coffey | Director | 3 Mar 2009 | 30 Apr 2013 | Australian | 63 years |
| Andrew John Watson | Director | 3 Mar 2009 | 27 Nov 2013 | British | 63 years |
| Angus Howard Fletcher | Director | 3 Nov 2005 | 28 Feb 2011 | British | 76 years |
| Anthony Alexander Preiskel | Director | 11 May 1991 | 3 Apr 2009 | British | 79 years |
| Bernadette Allinson | Secretary | 29 Sept 2006 | 22 Mar 2008 | Other | - |
| Christopher Frank Sadler | Director | 14 Jul 1999 | 6 Aug 2005 | British | 80 years |
| Cynthia Mary Coombe | Secretary | 20 Oct 2010 | 28 Jul 2014 | - | - |
| David Colin Sinclair Veitch | Director | 11 May 1991 | 23 Dec 1992 | British | 70 years |
| David John Nicholson | Secretary | 22 Mar 2008 | 20 Oct 2010 | Other | - |
| Edmund Kenneth Wyatt | Secretary | 11 May 1991 | 31 Jul 1993 | British | - |
| Edward Elliot Wilson | Director | 12 May 2008 | 23 Jun 2014 | British | 76 years |
| Gary Brooks | Director | 3 Nov 2005 | 31 Dec 2014 | British | 69 years |
| Graham Bidlake Corser | Director | 12 May 2008 | 31 Dec 2014 | British | 68 years |
| Ian Gregory Howie Barnett | Director | 3 Nov 2005 | 31 Dec 2014 | British | 76 years |
| John Richard Ashurst | Secretary | 31 Jul 1993 | 30 Oct 2002 | British | - |
| Joseph David Hudson | Director | 12 May 2008 | 22 Dec 2009 | British | 65 years |
| Michael Burns Neilson | Director | 11 Sept 2013 | 31 Dec 2014 | British | 67 years |
| Nicholas Lawrence Luff | Director | 3 Nov 2005 | 30 Apr 2006 | British | 59 years |
| Philip Alwyn Bignell | Director | 11 May 1991 | 29 Sept 2006 | British | 73 years |
| Philip Alwyn Bignell | Secretary | 30 Oct 2002 | 29 Sept 2006 | British | - |
| Rashidi Olugbenga Keshiro | Director | 12 May 2008 | 9 Apr 2018 | British | 60 years |
| Raymond Antony Knight | Director | 11 May 1991 | 16 Dec 2003 | British | 83 years |
| Richard Michael Gradon | Director | 3 Nov 2005 | 21 Jul 2006 | British | 67 years |
| Robert George Ferguson | Director | 11 May 1991 | 31 Jul 1999 | British | 87 years |
| Sayed Shuja Ali | Director | 30 Apr 2015 | 1 Sept 2016 | British | 60 years |
| Seshadri Rengaswamy Karaikuruchi | Director | 30 Apr 2015 | 30 Aug 2016 | Indian | 63 years |
| Stephen Oliver Francis Kerridge | Director | 3 Nov 2005 | 28 Dec 2007 | British | 81 years |
| Timothy John Randolph Harding | Director | 11 May 1991 | 23 Dec 1992 | British | 86 years |
| William Thomas Edgerley | Director | 3 Nov 2005 | 15 Jul 2009 | British | 70 years |
| Ziad Khalil Makkawi | Director | 27 Nov 2013 | 13 Jun 2014 | French | 65 years |