| Andrew Christopher Bolter | Director | 11 Jul 2003 | 1 Dec 2005 | British | 55 years |
| Benjamin John Guyatt | Director | 13 Jun 2008 | 1 Jun 2011 | British | 50 years |
| Brian Arthur Wheeler | Director | 30 Nov 1991 | 1 Nov 1993 | British | 88 years |
| Brian Robert Jackson | Director | 30 Nov 1991 | 1 Nov 1993 | British | 79 years |
| Carsten Matthias Wendt | Director | 1 Dec 2016 | 26 Oct 2021 | German | 49 years |
| Christian Leclercq | Director | 2 Jun 2008 | 31 Mar 2010 | Belgian | 60 years |
| David Charles Aspinall | Director | 30 Nov 1991 | 1 Nov 1993 | British | 81 years |
| David Charles Aspinall | Secretary | 30 Nov 1991 | 1 Nov 1993 | British | - |
| David John Egan | Director | 1 Jun 2007 | 16 Jun 2008 | British | 58 years |
| David John Snowdon | Director | 1 Nov 1993 | 29 Mar 1996 | British | 81 years |
| David Jonathan Clarke | Director | 1 Jun 2011 | 1 Dec 2016 | British | 51 years |
| Graham Dransfield | Director | 11 Jul 2003 | 30 Jun 2008 | British | 74 years |
| Graham Dransfield | Secretary | 10 Dec 2007 | 30 Jun 2008 | British | - |
| Ian Alan Duncan Peters | Director | 1 Oct 2000 | 11 Jul 2003 | British | 60 years |
| Ian Alan Duncan Peters | Secretary | 1 Dec 2000 | 11 Jul 2003 | British | - |
| Ian Paul Tyler | Director | 1 Nov 1993 | 29 Mar 1996 | British | 65 years |
| Ian Paul Tyler | Secretary | 1 Nov 1993 | 29 Mar 1996 | British | - |
| John Charles Meins | Director | 1 Nov 1993 | 31 Dec 1999 | British | 86 years |
| Nicholas Swift | Director | 11 Jul 2003 | 1 Jun 2007 | British | 61 years |
| Paul Derek Tunnacliffe | Secretary | 11 Jul 2003 | 10 Dec 2007 | British | - |
| Richard Antony Bruce Varcoe | Director | 31 Oct 1997 | 1 Dec 2000 | British | 66 years |
| Richard Antony Bruce Varcoe | Secretary | 31 Oct 1997 | 1 Dec 2000 | British | - |
| Richard Robert Gimmler | Director | 13 Jun 2008 | 30 Dec 2009 | British | 58 years |
| Roger Thomas Virley Tyson | Secretary | 31 Jul 2008 | 10 Mar 2016 | British | - |
| Ruth Coulson | Director | 1 Dec 2005 | 20 Jun 2008 | Australian | 52 years |
| Seyda Pirinccioglu | Director | 19 Jul 2010 | 31 Aug 2013 | Turkish | 54 years |
| Simon Neil Vivian | Director | 29 Mar 1996 | 30 Jun 2003 | British | 68 years |
| Simon Roger Fernley | Director | 29 Mar 1996 | 31 Oct 1997 | British | 75 years |
| Simon Roger Fernley | Secretary | 29 Mar 1996 | 31 Oct 1997 | British | - |