| ASHMAN, Andrew Russell ACTIVE | Secretary | 21 Jan 2021 | | | | 10, Gainsborough Gardens, London, NW3 1BJ, England |
| ASHMAN, Andrew Russell ACTIVE | Director | 21 Jan 2021 | | England | November 1949 | 10, Gainsborough Gardens, London, NW3 1BJ, England |
| BROOKS, Sally Ann ACTIVE | Director | 23 Jan 2025 | | England | January 1962 | 10, Gainsborough Gardens, London, NW3 1BJ, England |
| FREUD, Emma ACTIVE | Director | 23 Jan 2025 | | England | January 1962 | 10, Gainsborough Gardens, London, NW3 1BJ, England |
| NASH, Lesley Ann ACTIVE | Director | 31 Mar 2018 | | United Kingdom | May 1965 | 10, Gainsborough Gardens, London, NW3 1BJ, England |
| STROBEL, Margarita Magdalena (Madeleine) ACTIVE | Director | 09 Jan 2020 | | England | December 1950 | 5, Gainsborough Gardens, London, NW3 1BJ, England |
| COUNCELL, Derek John RESIGNED | Secretary | 20 Mar 1996 | 17 Jul 2001 | | | 11 Gainsborough Gardens, London, NW3 1BJ |
| FRASER, Simon Richard RESIGNED | Secretary | | 20 Mar 1996 | | | 10 Gainsborough Gardens, Hampstead, London, NW3 1BJ |
| LAVERY, Andrew David RESIGNED | Secretary | 23 Jun 2008 | 21 Jan 2021 | | | 14, Gainsborough Gardens, London, NW3 1BJ |
| STYLE, Christopher John David RESIGNED | Secretary | 17 Jul 2001 | 23 Jun 2008 | | | One Silk Street, London, EC2Y 8HQ |
| ANDREWS, Helen Louise RESIGNED | Director | 20 Jun 2007 | 30 Jun 2013 | England | January 1966 | 12 Gainsborough Gardens, London, NW3 1BJ |
| ARNOLD, Eleanor Pole RESIGNED | Director | 23 Jun 2008 | 22 Jan 2015 | United Kingdom | July 1962 | 8, Gainsborough Gardens, London, NW3 1BJ |
| ASHMAN, Andrew Russell RESIGNED | Director | 22 Apr 1999 | 23 Jun 2008 | England | November 1949 | 7 Prince Arthur Mews, London, NW3 1RD |
| BRENT, Thomas Robert RESIGNED | Director | 07 Jan 1993 | 16 Feb 1994 | | September 1950 | 20 Parliament Hill, Hampstead, London, NW3 2TU |
| BRESGES, Susanne RESIGNED | Director | 21 Jan 1997 | 31 Mar 2011 | United Kingdom | September 1962 | 13 Gainsborough Gardens, London, NW3 1BJ |
| CORNWELL, Valerie Jane RESIGNED | Director | | 07 Jan 1993 | England | April 1938 | 9 Gainsborough Gardens, London, NW3 1BJ |
| COUNCELL, Derek John RESIGNED | Director | 16 Feb 1994 | 17 Jul 2001 | United Kingdom | September 1937 | 11 Gainsborough Gardens, London, NW3 1BJ |
| CRISPIN, Jane, Dr RESIGNED | Director | 10 Jan 2017 | 03 Oct 2022 | England | May 1957 | 10, Gainsborough Gardens, London, NW3 1BJ, England |
| CRISPIN, Jane, Dr RESIGNED | Director | 04 May 2000 | 07 Jun 2005 | England | May 1957 | 3 Gainsborough Gardens, London, NW3 1BJ |
| EVANS, Paul John RESIGNED | Director | 23 Jun 2008 | 21 Jan 2021 | United Kingdom | May 1947 | Heath Lodge Heath Side, Hampstead, London, NW3 1LB |
| FRASER, Simon Richard RESIGNED | Director | 21 Jan 1997 | 22 Apr 1999 | | February 1945 | 10 Gainsborough Gardens, Hampstead, London, NW3 1BJ |
| FRASER, Simon Richard RESIGNED | Director | | 20 Mar 1996 | | February 1945 | 10 Gainsborough Gardens, Hampstead, London, NW3 1BJ |
| LAVERY, Alexandra April Naomi RESIGNED | Director | 07 Jun 2005 | 23 Jun 2008 | | April 1948 | 14 Gainsborough Gardens, London, NW3 1BJ |
| LAVERY, Andrew David RESIGNED | Director | 23 Jun 2008 | 21 Jan 2021 | United Kingdom | June 1953 | 14, Gainsborough Gardens, London, NW3 1BJ |
| LAVY, Andrew David RESIGNED | Director | | 04 May 2000 | | June 1953 | 14 Gainsborough Gardens, London, NW3 1BJ |
| MCCULLAGH, Paul RESIGNED | Director | 29 Nov 2022 | 13 Jan 2026 | England | December 1987 | 10, Gainsborough Gardens, London, NW3 1BJ, England |
| MORRIS, Andrew Bernard RESIGNED | Director | 26 Jan 2015 | 09 Jan 2020 | England | October 1952 | Wellside, Well Walk, London, NW3 1BT, England |
| NIELSEN, Claudia RESIGNED | Director | | 21 Jan 1997 | | November 1946 | 4 Gainsborough Gardens, London, NW3 1BJ |
| SIMONS, Daniel RESIGNED | Director | | 23 Jun 1995 | | May 1950 | 15 West Hill Park, London, N6 6ND |
| SOSNOV, Sergiy RESIGNED | Director | 19 Jan 2023 | 23 Jan 2025 | England | February 1977 | 10, Gainsborough Gardens, London, NW3 1BJ, England |
| STROBEL, Stephan RESIGNED | Director | 17 Jul 2001 | 20 Jun 2007 | | October 1947 | 5 Gainsborough Gardens, London, NW3 1BJ |
| STROBEL, Stephan RESIGNED | Director | | 22 Apr 1999 | | October 1947 | Cottage On The Heath, London, NW3 |
| STYLE, Christopher John David RESIGNED | Director | 26 Jan 2015 | 19 Jan 2023 | England | April 1955 | 10, Gainsborough Gardens, London, NW3 1BJ, England |
| STYLE, Christopher John David RESIGNED | Director | 22 Apr 1999 | 23 Jun 2008 | United Kingdom | April 1955 | One Silk Street, London, EC2Y 8HQ |
| WILSON, Ian Henry RESIGNED | Director | 30 Jun 2010 | 31 Mar 2018 | England | February 1953 | 11, Gainsborough Gardens, London, NW3 1BJ, England |