| ROBINSKI, Richard ACTIVE | Secretary | 12 Aug 2010 | | | | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU, England |
| ROGERS, Martin Ian ACTIVE | Director | 13 Feb 2018 | | United Kingdom | June 1968 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |
| TEMUCIN, Ebru Can ACTIVE | Director | 23 Jun 2017 | | England | October 1972 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |
| FLETCHER, Michael Cole RESIGNED | Secretary | | 20 Nov 1998 | | | 7 Arundel House, Courtlands, Richmond, Surrey, TW10 5AS |
| PAGE, Nicola Ann RESIGNED | Secretary | 19 Nov 2007 | 12 Aug 2010 | | | 3 Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| PLAYFORD, Richard RESIGNED | Secretary | 20 Nov 1998 | 18 Jan 2000 | | | Owls End 10 The Borough, Aldreth, Ely, Cambridgeshire, CB6 3PJ |
| POMEROY, Valerie Ann RESIGNED | Secretary | 18 Jan 2000 | 31 Jan 2004 | | | PO BOX 20980 Oriel House, 16 Connaught Place, London, W2 2ZB |
| O H SECRETARIAT LIMITED RESIGNED | Secretary | 31 Jan 2004 | 19 Nov 2007 | | | PO BOX 20980 Oriel House, 16 Connaught Place, London, W2 2ZB |
| AHMAD, Haseeb RESIGNED | Director | 12 Aug 2010 | 23 Mar 2012 | United Kingdom | March 1976 | Schering Plough House, Falcon Way Shire Park, Welwyn Garden City, Hertfordshire, AL7 1TW |
| BAART, Petrus Joannes RESIGNED | Director | 15 Jul 1991 | 20 Jun 1994 | | June 1935 | Langven 18, Heesch, 5384 Pt, Holland |
| BOUSFIELD, Keith RESIGNED | Director | 23 Mar 2012 | 31 Dec 2014 | United Kingdom | November 1959 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU, England |
| COUTTS, Gordon RESIGNED | Director | 22 Apr 2008 | 19 Nov 2009 | | December 1960 | 3 Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| EHREN, Stijn Michiel RESIGNED | Director | 22 Apr 2008 | 13 Dec 2011 | Netherlands | April 1968 | 3, Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| EVERS, Johannes Cornelius Claudius Bernardus RESIGNED | Director | 20 Nov 1998 | 30 Nov 2004 | | August 1943 | PO BOX 20980 Oriel House, 16 Connaught Place, London, W2 2ZB |
| FLETCHER, Michael Cole RESIGNED | Director | | 20 Nov 1998 | | March 1942 | 7 Arundel House, Courtlands, Richmond, Surrey, TW10 5AS |
| HILL, Christopher Huw, Dr RESIGNED | Director | 27 Apr 2007 | 22 Apr 2008 | United Kingdom | February 1960 | Unit 330 Cambridge Business Park, Milton Road, Cambridge, Cambridgeshire, CB4 0FL |
| HOUSON, Louise Jane RESIGNED | Director | 06 Sep 2016 | 19 Feb 2018 | United Kingdom | July 1976 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |
| INGRAM, Alexander Simpson RESIGNED | Director | 20 Nov 1998 | 30 Apr 2004 | | June 1945 | Rowanbank, 1 Dewars Mill, St Andrews, Fife, KY16 9TY |
| IVINSON, John Charles RESIGNED | Director | 30 Apr 2004 | 27 Apr 2007 | | May 1961 | Diosynth Limited, Muiredge Industrial Estate, Buckhaven, Fife, KY8 1LJ |
| KHANNA, Deepak Kumar RESIGNED | Director | 12 Aug 2010 | 30 Jun 2014 | United Kingdom | December 1965 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU, England |
| KOEHLER, Steven Hubrig RESIGNED | Director | 22 Apr 2008 | 12 Aug 2010 | Usa | August 1950 | 3 Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| LEONARD, Melissa RESIGNED | Director | 11 Dec 2013 | 15 Oct 2016 | United Kingdom | August 1972 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU, England |
| MCDOWELL, Mark Andrew Charles RESIGNED | Director | 12 Aug 2010 | 31 Dec 2013 | United Kingdom | January 1955 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU, England |
| MINEUR, Petrus Wilhelmus RESIGNED | Director | 20 Jun 1994 | 20 Nov 1998 | | February 1937 | Hoogstraat 7, Nl 5834 B Heesch, The Netherlands |
| NALLY, Michael Thomas RESIGNED | Director | 30 Jun 2014 | 30 Sep 2016 | United Kingdom | January 1976 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |
| NICHOLSON, Simon RESIGNED | Director | 31 Dec 2014 | 19 Feb 2018 | England | July 1975 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |
| POLZ, Gertraud RESIGNED | Director | 06 Sep 2016 | 23 Jun 2017 | England | May 1974 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |
| SANDERS, Adrianus Lambertus Maria RESIGNED | Director | 30 Nov 2004 | 22 Apr 2008 | | December 1946 | Diosynth Limited, Muiredge Industrial Estate, Buckhaven, Fife, KY8 1LJ |
| VEKEMANS, Felix Louis RESIGNED | Director | | 30 Jun 1991 | | May 1933 | Sophiaweg 117 6564ab, Heilig Land-Hichting, FOREIGN, Holland |
| WHITE, Katherine Elizabeth RESIGNED | Director | 31 Dec 2014 | 18 Mar 2016 | United Kingdom | March 1958 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |