| SINCLAIR, Alistair James ACTIVE | Director | 30 Oct 2008 | | Australia | September 1949 | Lynton House, 7-12 Tavistock Square, London, WC1H 9BQ |
| SINCLAIR, Nicholas Andrew ACTIVE | Director | 05 Sep 2020 | | Australia | April 1977 | Lynton House, 7-12 Tavistock Square, London, WC1H 9BQ |
| SINCLAIR, Simon Alistair ACTIVE | Director | 05 Sep 2020 | | Singapore | September 1978 | Lynton House, 7-12 Tavistock Square, London, WC1H 9BQ |
| BRAY, Maria Magdalena RESIGNED | Secretary | 24 Jan 2001 | 30 Sep 2004 | | | 4 Clarence Terrace, Regents Park, London, NW1 4RD |
| LANGRISH SMITH, Elizabeth RESIGNED | Secretary | 13 Mar 2006 | 30 Oct 2008 | | | 6 The Glade, Woodford Green, Essex, IG8 0QA |
| SIMKINS, Susan Mary RESIGNED | Secretary | 30 Oct 2008 | 17 Sep 2014 | | | The Spinney, Cherry Tree Lane, Fulmer, Buckinghamshire, SL3 6JE |
| SIMKINS, Susan Mary RESIGNED | Secretary | 05 Sep 1991 | 31 Jan 2001 | | | The Spinney, Cherry Tree Lane, Fulmer, Buckinghamshire, SL3 6JE |
| SINCLAIR, Daphne RESIGNED | Secretary | | 05 Sep 1991 | | | 16 High Mead, Chigwell, Essex, IG7 6PU |
| LANGRISH SMITH, Elizabeth RESIGNED | Director | 13 Mar 2006 | 30 Oct 2008 | England | April 1952 | 6 The Glade, Woodford Green, Essex, IG8 0QA |
| LEDERER, Nicholas Charles RESIGNED | Director | 24 Jan 2001 | 13 Mar 2006 | United Kingdom | July 1945 | Bloomfield Cottage, 49 Raleigh Road, Enfield, Middlesex, EN2 6UD |
| SIMKINS, Ronald William RESIGNED | Director | 30 Oct 2008 | 17 Sep 2014 | United Kingdom | April 1944 | The Spinney Cherry Tree Lane, Fulmer, Slough, Buckinghamshire, SL3 6JE |
| SIMKINS, Ronald William RESIGNED | Director | 05 Sep 1991 | 31 Jan 2001 | United Kingdom | April 1944 | The Spinney Cherry Tree Lane, Fulmer, Slough, Buckinghamshire, SL3 6JE |
| SIMKINS, Susan Mary RESIGNED | Director | 13 Mar 2006 | 17 Sep 2014 | United Kingdom | May 1955 | The Spinney, Cherry Tree Lane, Fulmer, Buckinghamshire, SL3 6JE |
| SIMKINS, Susan Mary RESIGNED | Director | 05 Sep 1991 | 31 Jan 2001 | United Kingdom | May 1955 | The Spinney, Cherry Tree Lane, Fulmer, Buckinghamshire, SL3 6JE |
| SINCLAIR, Daphne RESIGNED | Director | | 05 Sep 1991 | | December 1990 | 16 High Mead, Chigwell, Essex, IG7 6PU |
| SINCLAIR, Duncan Morrall RESIGNED | Director | 24 Jan 2001 | 17 Feb 2006 | United Kingdom | October 1947 | The Paddocks, Howe Green, Hertford, Hertfordshire, SG13 8LH |
| SINCLAIR, Frank Peter RESIGNED | Director | | 05 Sep 1991 | | November 1915 | 16 High Mead, Chigwell, Essex, IG7 6PU |
| SINCLAIR, Mary Gillin RESIGNED | Director | 28 Nov 2011 | 05 Sep 2020 | Australia | July 1946 | Lynton House, 7-12 Tavistock Square, London, WC1H 9BQ, United Kingdom |
| WILLIAMS, Angela RESIGNED | Director | 13 Mar 2006 | 30 Oct 2008 | England | April 1952 | 22 Courtland Drive, Chigwell, Essex, IG7 6PW |