| CLIFTON-MELHUISH, Steven John ACTIVE | Secretary | 29 Aug 2023 | | | | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| BARRON, Tanya ACTIVE | Director | 14 May 2019 | | England | March 1954 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| HEMELGE, Nimal Jude ACTIVE | Director | 24 Jan 2022 | | United Kingdom | August 1974 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| HUTCHEON, Joy Louise ACTIVE | Director | 14 May 2019 | | England | February 1965 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| SIMONS, Jonathan ACTIVE | Director | 19 Sep 2019 | | England | June 1982 | Highbridge House, 16-18 Duke Street, Reading, Berkshire, RG1 4RU, United Kingdom |
| TUTT, Anne Catherine ACTIVE | Director | 16 May 2024 | | England | December 1953 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| WAMBUGU, Edward Muchemi ACTIVE | Director | 26 Jan 2022 | | Kenya | September 1968 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| ADDERLEY, Clive RESIGNED | Secretary | 17 Mar 2005 | 18 Feb 2015 | | | 60 Queens Road, Reading, Berkshire, RG1 4BS |
| BIRKETT, Richard Henry Struan RESIGNED | Secretary | | 11 Dec 1998 | | | 5 Abbey Cottages, Ferry Lane,Medmenham, Marlow, Buckinghamshire, SL7 2HB |
| MILES, Robert Gerard RESIGNED | Secretary | 09 Jun 2015 | 29 Aug 2023 | | | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| PARR, John Edmeston RESIGNED | Secretary | 11 Dec 1998 | 17 Mar 2005 | | | 4 King George Street, Greenwich, London, SE10 8QJ |
| AUSTIN, James Dewi Ernest RESIGNED | Director | | 15 Aug 1993 | | November 1950 | Elisen Strasse 2, 1000 Berlin 41, Germany |
| BOWLES, Cameron RESIGNED | Director | 16 Mar 2006 | 19 Nov 2009 | | August 1965 | 26 Archer Street, Canberra Act 2602, Australia |
| COLLS, Graham RESIGNED | Director | 01 Jun 2007 | 04 Nov 2010 | England | November 1955 | 60 Queens Road, Reading, Berkshire, RG1 4BS |
| COULSON, Timothy John, Dr RESIGNED | Director | 18 May 2023 | 07 Sep 2025 | England | May 1959 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| FIELDEN, John RESIGNED | Director | 16 Nov 2006 | 13 Nov 2008 | | February 1939 | Poland House, Odiham, Basingstoke, Hampshire, RG25 1JJ |
| FIELDEN, John RESIGNED | Director | | 16 Dec 1993 | | February 1939 | Poland House, Odiham, Basingstoke, Hampshire, RG25 1JJ |
| FITZPATRICK, Anthony Michael RESIGNED | Director | | 29 Sep 1997 | | March 1942 | Hohemarkstrasse 196b, D 6370 Oberursel, Germany |
| GILBERT, Christine Bridget RESIGNED | Director | 30 Apr 2015 | 18 May 2023 | England | December 1949 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| GRAF, Charles Philip RESIGNED | Director | 03 Nov 2011 | 01 Nov 2018 | England | October 1946 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| GRANT, Julia Catherine RESIGNED | Director | 06 Jul 2017 | 22 May 2025 | England | September 1960 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| HARWOOD, John Warwick RESIGNED | Director | 16 Nov 2004 | 17 Nov 2011 | England | December 1946 | 60, Queens Road, Reading, Berkshire, RG1 4BS |
| HAWKER, David Gordon RESIGNED | Director | 17 Nov 2011 | 30 Apr 2019 | United Kingdom | February 1954 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| HEADICAR, Marion Elizabeth RESIGNED | Director | 01 Jun 2007 | 15 Nov 2012 | United Kingdom | October 1947 | 60 Queens Road, Reading, Berkshire, RG1 4BS |
| HENDERSON, Thelma Anne RESIGNED | Director | 11 Dec 1998 | 15 Nov 2007 | United Kingdom | September 1934 | 4 Spring Court, Spring Hill Bubbenhall, Coventry, West Midlands, CV8 3BD |
| HIGHAM, Anita Mary Clarke RESIGNED | Director | 15 Nov 2007 | 25 Jun 2009 | United Kingdom | October 1936 | Polygon House, Berry Hill Road Adderbury West, Banbury, Oxfordshire, OX17 3HF |
| HIGHAM, Anita Mary Clarke RESIGNED | Director | 29 Sep 1997 | 21 Mar 2001 | United Kingdom | October 1936 | Polygon House, Berry Hill Road Adderbury West, Banbury, Oxfordshire, OX17 3HF |
| HODSON, Sara Margaret RESIGNED | Director | 16 Nov 2006 | 04 Dec 2014 | England | October 1946 | 60 Queens Road, Reading, Berkshire, RG1 4BS |
| HODSON, Sara Margaret RESIGNED | Director | | 16 Dec 1993 | England | October 1946 | 43 Wilmington Avenue, London, W4 3HA |
| HOFMANN, Yetunde Yewande RESIGNED | Director | 01 Nov 2018 | 31 Dec 2020 | England | June 1963 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| HOWLING, Ilse Robin Charis RESIGNED | Director | 01 Nov 2018 | 31 May 2026 | United Kingdom | August 1965 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| HUMPHREYS, Robert Griffith RESIGNED | Director | 24 May 2016 | 03 Jul 2024 | England | April 1957 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| HUNT, Sue RESIGNED | Director | 14 Nov 2008 | 24 May 2016 | United Kingdom | December 1964 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| IREDALE, Roger Oliver, Professor RESIGNED | Director | 16 Dec 1993 | 02 Jul 1998 | | August 1934 | 57 Whaley Lane, Whaley Bridge, High Peak, Derbyshire, SK23 7BA |
| LAING, Stuart John RESIGNED | Director | 01 Oct 2008 | 24 May 2016 | England | July 1948 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| LOCK, Sarah Anne RESIGNED | Director | 07 Sep 1996 | 09 Jun 2000 | | July 1954 | 24 Lavers Road, London, N16 0DT |
| MACARTHUR, Iain Roderick Martin RESIGNED | Director | 29 Sep 1997 | 13 Nov 2008 | United Kingdom | May 1945 | Flat 1 16 Arundel Square, London, N7 8AT |
| MACLEOD, Alison RESIGNED | Director | 28 Jun 2010 | 18 Nov 2018 | England | September 1958 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| MCFARLANE, Angela Elizabeth, Dr RESIGNED | Director | 06 Jul 2017 | 22 May 2025 | England | December 1957 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| OWEN, Jonathan Robert RESIGNED | Director | 24 May 2016 | 30 Sep 2018 | England | June 1958 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| PARR, John Edmeston RESIGNED | Director | | 17 Sep 1998 | United Kingdom | June 1933 | 4 King George Street, Greenwich, London, SE10 8QJ |
| PHILLIPS, Peter Haydn, Dr RESIGNED | Director | | 16 Dec 1993 | United Kingdom | July 1934 | The Dower House, Cookham, Berkshire, SL6 9SN |
| PLATTS, Margaret RESIGNED | Director | 19 Nov 2009 | 15 Nov 2012 | England | August 1948 | 60 Queens Road, Reading, Berkshire, RG1 4BS |
| RAWLINSON, Peter, Dr RESIGNED | Director | 17 Nov 2011 | 31 Jul 2019 | United Kingdom | November 1954 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| RICHARDSON, Mary, Dame RESIGNED | Director | 21 Mar 2001 | 16 Nov 2006 | United Kingdom | February 1936 | 13 Abbey Avenue, St. Albans, Hertfordshire, AL3 4BJ |
| ROSE, Jim RESIGNED | Director | 19 Nov 2009 | 04 Dec 2014 | England | June 1939 | 60 Queens Road, Reading, Berkshire, RG1 4BS |
| SINCLAIR, John, Professor RESIGNED | Director | | 28 Jun 1993 | | June 1933 | 94 Oakfield Road, Selly Oak, Birmingham, West Midlands, B29 7EG |
| STUART, Andrew Christopher RESIGNED | Director | | 16 Nov 2004 | United Kingdom | November 1928 | Long Hall, North Street, Wareham, Dorset, BH20 4AG |
| WALSH, Timothy John, Dr RESIGNED | Director | 26 Jun 2009 | 28 Apr 2017 | England | December 1960 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| WATSON, Donald William Thomas, Dr RESIGNED | Director | | 25 Jul 1996 | | July 1936 | Rock Cottage, Beetham, Milnthorpe, Cumbria, LA7 7AX |
| WEBB, John Malcolm RESIGNED | Director | 22 Mar 2000 | 17 Nov 2011 | England | December 1940 | 60 Queens Road, Reading, Berkshire, RG1 4BS |
| WEBB, John RESIGNED | Director | | 03 Apr 1997 | | December 1940 | 28 Princes Court, Rope Street, London, SE16 1TD |
| WOOD, Philip Kenneth RESIGNED | Director | 01 Jul 2009 | 06 Jul 2017 | England | May 1955 | Highbridge House, 16-18 Duke Street, Reading, RG1 4RU, England |
| YEO, Stephen, Professor RESIGNED | Director | 17 Sep 1998 | 19 Nov 2009 | England | June 1939 | The Ropewalks 92 Acre End Street, Eynsham, Witney, Oxfordshire, OX8 1PD |