| ELPHICK, Jason Stanley ACTIVE | Secretary | 15 Jul 2016 | | | | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| ALVAREZ LABIANO, Enrique ACTIVE | Director | 01 Sep 2026 | | United Kingdom | December 1978 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| ATWAL, Kalvinder ACTIVE | Director | 07 Feb 2023 | | United Kingdom | September 1971 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| BULLOCH, Robert James Mackenzie ACTIVE | Director | 01 Apr 2026 | | Scotland | December 1961 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| DAUBENEY, Henry James ACTIVE | Director | 01 Jul 2024 | | England | October 1963 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| HOSKIN, Gareth ACTIVE | Director | 01 Apr 2025 | | United Kingdom | September 1960 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| JONES-EVANS, Sally Ann ACTIVE | Director | 01 Apr 2025 | | United Kingdom | July 1966 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| SULLIVAN-HYDE, Victoria Jane ACTIVE | Director | 23 Jul 2024 | | United Kingdom | June 1976 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| WALKER, Simon ACTIVE | Director | 04 Jan 2022 | | England | February 1959 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| WEYMOUTH, David Avery ACTIVE | Director | 01 Sep 2017 | | United Kingdom | May 1955 | Reliance House, Sun Pier, Chatham, England, ME4 4ET, England |
| BUCKNELL, Zoe RESIGNED | Secretary | 22 Feb 2011 | 31 Mar 2016 | | | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| BYRNE, Christopher RESIGNED | Secretary | 20 Aug 2010 | 22 Feb 2011 | | | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| PURVIS, Martin Terence Alan RESIGNED | Secretary | 31 Mar 2016 | 15 Jul 2016 | | | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| ALLATT, John Graham RESIGNED | Director | 06 May 2014 | 11 May 2023 | United Kingdom | April 1948 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| ANSTEE, Eric Edward RESIGNED | Director | 21 Dec 2015 | 04 Feb 2020 | England | January 1951 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| BROOKE, Timothy Tracy RESIGNED | Director | 04 Oct 2019 | 07 May 2020 | England | September 1960 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| DOMAN, Andrew Spencer RESIGNED | Director | 26 Jul 2016 | 10 May 2018 | England | December 1951 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| DUKE, Rodney Jympson RESIGNED | Director | 04 Jul 2012 | 04 Feb 2020 | United Kingdom | May 1950 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| FAIREY, Michael Edward RESIGNED | Director | 02 Apr 2014 | 10 May 2017 | United Kingdom | June 1948 | Reliance House, Sun Pier, Chatham, England, ME4 4ET, England |
| FINCH, Anna Ruth RESIGNED | Director | 13 Jul 2010 | 02 Aug 2010 | United Kingdom | June 1963 | 170, Cambridge Street, London, SW1V 4QE, United Kingdom |
| GOLDING, Andrew John RESIGNED | Director | 30 Dec 2011 | 31 Aug 2026 | England | January 1969 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| HANFORD, Timothy John RESIGNED | Director | 01 Feb 2011 | 31 Dec 2017 | United Kingdom | April 1964 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET, United Kingdom |
| HARWERTH, Elizabeth Noel RESIGNED | Director | 04 Oct 2019 | 07 May 2026 | United Kingdom | December 1947 | The Observatory, Brunel Way, Dock Road, Chatham, Kent, ME4 4AF, United Kingdom |
| HASSALL, Margaret Grace RESIGNED | Director | 26 Jul 2016 | 07 May 2020 | Scotland | March 1961 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| HEDGER, Sarah Ann RESIGNED | Director | 01 Feb 2019 | 08 May 2025 | United Kingdom | February 1965 | Reliance House, Sun Pier, Chatham, England, ME4 4ET, England |
| KAPOOR, Rajan RESIGNED | Director | 04 Oct 2019 | 08 May 2025 | England | April 1952 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| LAZENBY, Michael John RESIGNED | Director | 02 Aug 2010 | 28 Feb 2011 | United Kingdom | May 1955 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET, United Kingdom |
| LLOYD, Samuel George Alan RESIGNED | Director | 13 Jul 2010 | 13 Jul 2010 | Wales | March 1960 | 14/18, City Road, Cardiff, CF24 3DL, United Kingdom |
| MCCAIG, Malcolm Graham RESIGNED | Director | 02 Aug 2010 | 31 Dec 2016 | England | May 1955 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET, United Kingdom |
| MCCARTHY, Malcolm Christopher, Sir RESIGNED | Director | 01 Feb 2011 | 02 May 2014 | United Kingdom | February 1944 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET, United Kingdom |
| MCNAMARA, Mary Jane RESIGNED | Director | 06 May 2014 | 11 May 2023 | England | August 1960 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| MILLS, David John RESIGNED | Director | 23 Feb 2011 | 02 May 2014 | United Kingdom | February 1944 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET, United Kingdom |
| MORGAN, David Raymond RESIGNED | Director | 01 Feb 2011 | 31 Dec 2016 | England | March 1947 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| MOSS, Nathan Victor RESIGNED | Director | 14 May 2014 | 31 May 2017 | England | November 1955 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| NEWELL, Andrew RESIGNED | Director | 20 Aug 2010 | 29 May 2012 | England | June 1956 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET, United Kingdom |
| SCRUTON, Robert RESIGNED | Director | 02 Aug 2010 | 28 Jun 2011 | United Kingdom | April 1952 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET, United Kingdom |
| TALINTYRE, April Carolyn RESIGNED | Director | 22 Jun 2012 | 09 May 2024 | England | September 1965 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| THOMPSELL, Nicholas Peter RESIGNED | Director | 13 Jul 2010 | 11 Aug 2010 | England | September 1959 | 35, Vine Street, London, EC3N 2AA |
| WARD, Ian William RESIGNED | Director | 04 Oct 2019 | 07 May 2020 | United Kingdom | May 1949 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| WILCKE, Stephan RESIGNED | Director | 01 Feb 2011 | 11 May 2016 | England | June 1970 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET, United Kingdom |
| WILLIAMS, Peter Richard, Dr RESIGNED | Director | 07 Oct 2010 | 31 Dec 2013 | United Kingdom | July 1946 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| WILLIAMSON, George Malcolm, Sir RESIGNED | Director | 04 Oct 2019 | 04 Feb 2020 | United Kingdom | February 1939 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |
| WOOD, Jeremy Robin RESIGNED | Director | 21 Jun 2011 | 10 Jan 2012 | England | April 1961 | Reliance House, Sun Pier, Chatham, Kent, ME4 4ET |