| MARSH, Claire Catherine ACTIVE | Secretary | 15 Dec 2025 | | | | Ageas, Templars Way, Chandler's Ford, Eastleigh, SO53 3YA, England |
| ANDREWS, Annette Catherine ACTIVE | Director | 29 Sep 2025 | | England | October 1967 | The Observatory, Reigate, Surrey, RH2 0SG |
| COUMANS, Ben ACTIVE | Director | 29 Sep 2025 | | Belgium | April 1976 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, England |
| DE CUYPER, Hans ACTIVE | Director | 29 Sep 2025 | | Belgium | February 1969 | The Observatory, Reigate, Surrey, RH2 0SG |
| DE SMET, Bart Karel August ACTIVE | Director | 27 May 2026 | | Belgium | October 1957 | The Observatory, Reigate, Surrey, RH2 0SG |
| HAYNES, Jeremy William ACTIVE | Director | 01 Apr 2026 | | United Kingdom | May 1966 | Ageas House, Templars Way, Chandler's Ford, Eastleigh, SO53 3YA, England |
| JACKSON, Richard David ACTIVE | Director | 29 Sep 2025 | | England | March 1956 | The Observatory, Reigate, Surrey, RH2 0SG |
| MIDDLE, Anthony Edward ACTIVE | Director | 29 Sep 2025 | | United Kingdom | January 1970 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, England |
| MUSTOE, Jane Emma ACTIVE | Director | 10 Aug 2026 | | Wales | November 1973 | The Observatory, Reigate, Surrey, RH2 0SG |
| PLATT, Alison Elizabeth ACTIVE | Director | 29 Sep 2025 | | England | February 1962 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, England |
| SMITH, Alistair Meyrick ACTIVE | Director | 29 Sep 2025 | | United Kingdom | July 1986 | The Observatory, Reigate, Surrey, RH2 0SG |
| TURNER, Stuart James ACTIVE | Director | 10 Aug 2026 | | United Kingdom | May 1969 | The Observatory, Reigate, Surrey, RH2 0SG |
| WAITE, Tara Jane ACTIVE | Director | 01 Apr 2026 | | England | February 1975 | Ageas House, Templars Way, Chandler's Ford, Eastleigh, SO53 3YA, England |
| BOLE, Peter Douglas RESIGNED | Secretary | 01 Jan 2024 | 30 Jun 2024 | | | The Observatory, Reigate, Surrey, RH2 0SG |
| EDWARDS, Nick RESIGNED | Secretary | 05 Jul 2013 | 30 Nov 2016 | | | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, United Kingdom |
| GIBSON, Carolyn Ann RESIGNED | Secretary | 01 Dec 2012 | 05 Jul 2013 | | | The Observatory, Reigate, Surrey, RH2 0SG |
| LODGE, Matthew Sebastian RESIGNED | Secretary | 25 Jan 1993 | 01 Aug 2000 | | | Rose Cottage Dog Lane, Stainland, Halifax, West Yorkshire, HX4 9QF |
| MACDONALD, Susan Margaret RESIGNED | Secretary | 18 Oct 2000 | 30 Nov 2012 | | | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG |
| MYERS, Anne Elizabeth RESIGNED | Secretary | | 28 Jan 1993 | | | 19 Heathfield Rise, Rishworth, Sowerby Bridge, West Yorkshire, HX6 4RS |
| RIVERS, Alice RESIGNED | Secretary | 01 Dec 2016 | 30 Sep 2019 | | | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, United Kingdom |
| SMITH, Caroline RESIGNED | Secretary | 01 Jul 2024 | 15 Dec 2025 | | | The Observatory, Reigate, Surrey, RH2 0SG |
| WAITE, Simon Nicholas RESIGNED | Secretary | 01 Aug 2000 | 18 Oct 2000 | | | 2 Coverdale Garth, Collingham, Wetherby, West Yorkshire, LS22 5LR |
| WHITEHEAD, Kirstin Rebecca RESIGNED | Secretary | 27 Jan 2020 | 31 Dec 2023 | | | The Observatory, Reigate, Surrey, RH2 0SG |
| BASSI, Luca RESIGNED | Director | 27 Sep 2019 | 29 Sep 2025 | England | June 1970 | The Observatory, Reigate, Surrey, RH2 0SG |
| BATABYAL, Colin RESIGNED | Director | 01 Aug 2005 | 27 Oct 2009 | | November 1960 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG |
| BIRRELL, Andrew Seaton RESIGNED | Director | 17 Dec 2019 | 31 Mar 2026 | Guernsey | June 1969 | The Observatory, Reigate, Surrey, RH2 0SG |
| BOLE, Peter Douglas RESIGNED | Director | 18 Mar 2020 | 29 Sep 2025 | Scotland | October 1969 | The Observatory, Reigate, Surrey, RH2 0SG |
| BRYANT, Matthew George Alfred RESIGNED | Director | 13 Feb 2019 | 03 Apr 2019 | United Kingdom | August 1983 | The Observatory, Reigate, Surrey, RH2 0SG |
| COCKROFT, Charles Stephen RESIGNED | Director | | 22 Sep 1993 | | July 1936 | 34 Cullingworth Road, Cullingworth, Bradford, West Yorkshire, BD13 5BD |
| COUZENS, Michael Alastair RESIGNED | Director | 30 Sep 1993 | 27 Jan 1995 | | January 1964 | Towngate House Towngate, Northowram, Halifax, West Yorkshire, HX3 7DX |
| EDWARDS, John Stephen RESIGNED | Director | 13 Sep 2005 | 22 Feb 2006 | | June 1955 | Ebbor House, Wookey Hole, Wells, Somerset, BA5 1AY |
| GRAHAM, Peter John RESIGNED | Director | 01 Aug 2000 | 22 Jun 2006 | England | May 1962 | 87 Harestone Valley Road, Caterham, Surrey, CR3 6HQ |
| HANNAH, Charles Gordon RESIGNED | Director | 14 Jun 2006 | 31 Oct 2014 | United Kingdom | December 1952 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, United Kingdom |
| HASTE, Andrew Kenneth RESIGNED | Director | 24 Mar 2020 | 29 Sep 2025 | England | January 1962 | The Observatory, Reigate, Surrey, RH2 0SG |
| HODKINSON, Phil Andrew RESIGNED | Director | 30 Apr 2004 | 07 Sep 2005 | England | April 1958 | Lynden Manor Langworthy Lane, Holyport, Berkshire, SL6 2HH |
| LING, Elisabeth Marguerite RESIGNED | Director | 29 Sep 2025 | 31 Mar 2026 | England | June 1974 | The Observatory, Reigate, Surrey, RH2 0SG |
| LODGE, Matthew Sebastian RESIGNED | Director | 25 Jan 1993 | 01 Aug 2000 | | September 1960 | Rose Cottage Dog Lane, Stainland, Halifax, West Yorkshire, HX4 9QF |
| LONG, Stephen Anthony RESIGNED | Director | 25 Apr 2018 | 18 Mar 2020 | United Kingdom | March 1985 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, United Kingdom |
| MARTIN-SIMON, Peter Michael RESIGNED | Director | 29 Sep 2025 | 30 Apr 2026 | United Kingdom | June 1975 | The Observatory, Reigate, Surrey, RH2 0SG |
| MCMILLAN, David John Ramsay RESIGNED | Director | 15 Jul 2019 | 29 Sep 2025 | United Kingdom | February 1966 | The Observatory, Reigate, Surrey, RH2 0SG |
| MCPHERSON, Donald James RESIGNED | Director | 27 Jan 1995 | 01 Aug 2000 | | October 1961 | 93 Upper Hall View, Northowram, Halifax, West Yorkshire, HX3 7ET |
| MYERS, Anne Elizabeth RESIGNED | Director | | 28 Jan 1993 | | June 1952 | 19 Heathfield Rise, Rishworth, Sowerby Bridge, West Yorkshire, HX6 4RS |
| OGDEN, Darren RESIGNED | Director | 29 Nov 2012 | 25 Jul 2019 | United Kingdom | August 1967 | The Observatory, Reigate, Surrey, RH2 0SG |
| PITT, David Francis RESIGNED | Director | 23 Mar 2015 | 25 Jul 2019 | England | October 1968 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, United Kingdom |
| PRICE, Jonathan Stewart RESIGNED | Director | 29 Sep 2025 | 15 Apr 2026 | England | October 1972 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, England |
| RUBENSTEIN, Alan Martin RESIGNED | Director | 26 Nov 2019 | 31 Dec 2021 | United Kingdom | September 1956 | The Observatory, Reigate, Surrey, RH2 0SG |
| SHAW, Peter Anderson RESIGNED | Director | 26 Nov 2019 | 29 Sep 2025 | Scotland | April 1959 | The Observatory, Reigate, Surrey, RH2 0SG |
| VANN, Stuart Robert RESIGNED | Director | 29 Sep 2010 | 18 Jan 2018 | United Kingdom | July 1971 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG, England |
| WHITEHOUSE, Andrew Peter RESIGNED | Director | 11 Jul 2003 | 31 Oct 2013 | United Kingdom | May 1962 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG |
| WOOD, Peter John RESIGNED | Director | 01 Aug 2000 | 27 Mar 2020 | England | November 1946 | The Observatory, Castlefield Road, Reigate, Surrey, RH2 0SG |