| ATCHINSON, Jacqueline Elizabeth ACTIVE | Secretary | 16 Mar 2019 | | | | 6, Thornbury Square, London, N6 5YW, England |
| ATCHINSON, Jacqueline Elizabeth, Mrs. ACTIVE | Director | 17 May 1994 | | United Kingdom | March 1950 | 6 Thornbury Square, Highgate, London, N6 5YN |
| CASSON, John Stuart ACTIVE | Director | 23 Jan 2026 | | England | January 1945 | 41, Edinburgh Gardens, Windsor, SL4 2AW, England |
| COHEN, Esther Susanna ACTIVE | Director | 19 Nov 2022 | | England | May 1944 | 1 Thornbury House, Thornbury Square, London, N6 5YW, United Kingdom |
| HOFWEBER, Julia Elisabeth, Dr ACTIVE | Director | 11 Jul 2021 | | England | April 1979 | House 9, Thornbury Square, London, N6 5YN, England |
| BARNARD, Mostyn RESIGNED | Secretary | 07 Apr 1992 | 05 Dec 1993 | | | 5 Thornbury Square, London, N6 5YN |
| BRIGSTOCK, Philip Andrew RESIGNED | Secretary | | 07 Apr 1992 | | | 2 Thornbury Square Hornsey Lane, Highgate, London, N6 5YN |
| CROSS, Jennifer Mary, Ms. RESIGNED | Secretary | 05 Dec 1993 | 06 Mar 2019 | | | 6 Thornbury House, Thornbury Square Highgate, London, N6 5YW |
| BARNARD, Mostyn RESIGNED | Director | 07 Apr 1992 | 05 Dec 1993 | | January 1948 | 5 Thornbury Square, London, N6 5YN |
| BRIGSTOCK, Philip Andrew RESIGNED | Director | | 18 Mar 1992 | | October 1955 | 2 Thornbury Square Hornsey Lane, Highgate, London, N6 5YN |
| CASSON, John Stuart RESIGNED | Director | 29 Aug 2021 | 22 Jan 2026 | England | January 1945 | 41, Edinburgh Gardens, Windsor, SL4 2AW, England |
| COWEN, Malcolm, Mr. RESIGNED | Director | 08 Sep 1997 | 07 Jul 2019 | United Kingdom | July 1934 | Flat 16 Thornbury House, Thornbury Square, London, N6 5YW |
| CROSS, Jennifer Mary, Ms. RESIGNED | Director | | 06 Mar 2019 | United Kingdom | August 1956 | 6 Thornbury House, Thornbury Square Highgate, London, N6 5YW |
| DORRIT LANDES, Suzanne, Mrs. RESIGNED | Director | | 06 Mar 2019 | United Kingdom | March 1935 | 10 Thornbury House, Thornbury Square, London, N6 5YW |
| GLOBE, Henry Brian, Sir RESIGNED | Director | 19 Nov 2022 | 27 Mar 2023 | England | June 1949 | 14 Thornbury House, Thornbury Square, London, N6 5YW, England |
| GREENBERG, Frances RESIGNED | Director | | 05 Dec 1993 | | October 1960 | 9 Thornbury Square, Highgate, London, N6 5YN |
| HALL, Anthony RESIGNED | Director | 17 Mar 2019 | 11 Jul 2021 | England | August 1952 | House 12, Thornbury Square, London, N6 5YW, England |
| MANNING, Lee Antony RESIGNED | Director | | 07 Apr 1992 | | November 1957 | 85 Woodvale, Muswell Hill, London, N10 3DL |
| TINKER, Richard James RESIGNED | Director | 29 Aug 2021 | 25 Jun 2023 | England | October 1972 | Applegate, Green Lane, Wibtoft, Leicestershire, LE17 5BB, England |
| WILLIAMS, Yoko RESIGNED | Director | 17 Mar 2019 | 31 May 2020 | England | October 1971 | House 7, Thornbury Square, London, N6 5YW, England |
| WOODWARD, Christopher John Harrison, Dr RESIGNED | Director | 17 May 1994 | 04 Aug 1997 | | April 1953 | 3 Thornbury Square, Hornsey Lane, Highgate, London, N6 5YN |