| 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 |
| MAGUIRE, James RESIGNED | Secretary | 19 Oct 1999 | 30 Jun 2006 | | | 1095 Morris Avenue, Union, New Jersey 07083, United States |
| MONNET, Dominique Pierre RESIGNED | Secretary | 06 May 1999 | 19 Oct 1999 | | | 2 Pine Ridge, London Road, St Albans, Hertfordshire, AL1 1JE |
| NORFOLK, Howard William RESIGNED | Secretary | | 06 May 1999 | | | 7 Pinecrest, Oaklands, Welwyn, Hertfordshire, AL6 0EQ |
| PAGE, Nicola Ann RESIGNED | Secretary | 30 Jun 2006 | 12 Aug 2010 | | | 3 Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| AHMAD, Haseeb RESIGNED | Director | 12 Aug 2010 | 23 Mar 2012 | United Kingdom | March 1976 | Schering-Plough House, Falcon Way Shire Park, Welwyn Garden City, Herts, AL7 1TW |
| BOUSFIELD, Keith RESIGNED | Director | 23 Mar 2012 | 31 Dec 2014 | United Kingdom | November 1959 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU, England |
| CORK, Anthony John RESIGNED | Director | | 07 May 1993 | | June 1948 | The Lodge Station Road, Haddenham, Ely, Cambs, CB6 3XD |
| COUTTS, Gordon RESIGNED | Director | 04 Jun 2004 | 19 Nov 2009 | | December 1960 | 3 Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| DIVIS, Gregory RESIGNED | Director | 28 Jun 2002 | 18 Dec 2003 | | August 1966 | 22 Ellerdale Road, Hampstead, London, NW3 6BB |
| EHREN, Stijn Michiel RESIGNED | Director | 12 Aug 2010 | 13 Dec 2011 | Netherlands | April 1968 | 3, Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| HELLEBO, Olav RESIGNED | Director | 02 Jan 2001 | 28 Jun 2002 | | July 1965 | 2 Hurst Close, Hampstead, London, NW11 6JJ |
| HILADO, Maria Teresa RESIGNED | Director | 30 May 2008 | 02 Jul 2009 | | June 1964 | 3, Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| HOUSON, Louise Jane RESIGNED | Director | 06 Sep 2016 | 19 Feb 2018 | United Kingdom | July 1976 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |
| ISKENDERIAN, Apet Georges RESIGNED | Director | 18 Dec 2003 | 30 Jun 2006 | | September 1944 | 3 Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| KHANNA, Deepak Kumar RESIGNED | Director | 21 Jan 2010 | 30 Jun 2014 | United Kingdom | December 1965 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU, England |
| KOEHLER, Steven Hubrig RESIGNED | Director | 30 Jun 2006 | 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 |
| MAGUIRE, James RESIGNED | Director | 01 Jun 1999 | 30 Jun 2006 | | January 1962 | 1095 Morris Avenue, Union, New Jersey 07083, United States |
| MARTIN, Peter RESIGNED | Director | 07 May 1993 | 10 Jul 1998 | | May 1956 | Martins The Green, Potton End, Berkhamsted, Hertfordshire, HP4 2QQ |
| 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 |
| MITRA, Ratnakar RESIGNED | Director | 18 Dec 2003 | 04 Jun 2004 | | August 1949 | 8 Independence Court, Madison, New Jersey, FOREIGN, Usa |
| MONNET, Dominique Pierre RESIGNED | Director | 01 Sep 1998 | 02 Jan 2001 | | June 1958 | 2 Pine Ridge, London Road, St Albans, Hertfordshire, AL1 1JE |
| MOORE, Ernest Kevin RESIGNED | Director | 30 Jun 2006 | 24 Sep 2008 | | November 1952 | 3 Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| 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 |
| NORFOLK, Howard William RESIGNED | Director | | 06 May 1999 | | March 1951 | 7 Pinecrest, Oaklands, Welwyn, Hertfordshire, AL6 0EQ |
| POLZ, Gertraud RESIGNED | Director | 06 Sep 2016 | 23 Jun 2017 | England | May 1974 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |
| WHITE, Katherine Elizabeth RESIGNED | Director | 31 Dec 2014 | 18 Mar 2016 | United Kingdom | March 1958 | West Hill, Hertford Road, Hoddesdon, Hertfordshire, EN11 9BU |