| ENGEL, Yaron, Mr. ACTIVE | Secretary | 19 Feb 2018 | | | | 3, Park Road, Teddington, TW11 0AP, England |
| BROWN, James Mackenzie ACTIVE | Director | 23 Jul 2026 | | England | November 1974 | 3, Park Road, Teddington, TW11 0AP, England |
| TROWER, Edward James Gosselin ACTIVE | Director | 23 Jul 2026 | | England | September 1987 | 3, Park Road, Teddington, TW11 0AP, England |
| BANCROFT, Maureen RESIGNED | Secretary | | 01 Apr 1993 | | | 21 Heath Hurst Road, London, NW3 2RU |
| MORTON, James Edward RESIGNED | Secretary | 31 Aug 2016 | 19 Feb 2018 | | | 3, Park Road, Teddington, TW11 0AP, England |
| WEDD, Jacqueline Anne RESIGNED | Secretary | 01 Apr 1993 | 31 Aug 2016 | | | 255 Colney Hatch Lane, Friern Barnet, London, N11 3DH |
| ACKERMAN, Keith RESIGNED | Director | 01 Apr 2000 | 02 Oct 2000 | | October 1960 | 9 Somerton Road, London, NW2 1RH |
| BROWN, Alan Roger RESIGNED | Director | | 30 Sep 2004 | | May 1936 | 11 Willoughby Road, Hampstead, London, NW3 1RT |
| DOBLE, Jeffrey Ian RESIGNED | Director | 19 Feb 2018 | 08 Mar 2021 | United Kingdom | August 1959 | 3, Park Road, Teddington, TW11 0AP, England |
| GEE, Jeremy Simon RESIGNED | Director | 26 Apr 1994 | 30 Jul 1999 | | February 1967 | 4 Fairgreen East, Barnet, Hertfordshire, EN4 0QR |
| HUGHES, Jonathan Scott RESIGNED | Director | 30 Sep 2004 | 19 Feb 2018 | United Kingdom | September 1963 | 10, Elm Crescent, London, W5 3JW, United Kingdom |
| KASHYAP, Ashwin, Mr. RESIGNED | Director | 19 Feb 2018 | 23 Jul 2026 | England | September 1977 | 3, Park Road, Teddington, TW11 0AP, England |
| MORTON, James Edward RESIGNED | Director | 30 Sep 2004 | 19 Feb 2018 | England | July 1968 | 4 Preston Close, Twickenham, Middlesex, TW2 5RU |
| SUMRAY, Mark Gary RESIGNED | Director | 26 Apr 1994 | 30 Sep 2004 | | October 1963 | 32 Hogarth Hill, London, NW11 6BA |