| CURTICE, Lisa Joan, Dr ACTIVE | Director | | | Scotland | April 1953 | 2-R, 40 Queensborough Gardens, Glasgow, Lanarkshire, G12 9QS |
| CZAUDERNA, Jack Maciej, Dr ACTIVE | Director | 16 Jun 2005 | | England | February 1952 | 185 Chippinghouse Road, Sheffield, South Yorkshire, S7 1DQ |
| HAWLEY, Rosemary Helen ACTIVE | Director | 27 May 2002 | | England | October 1944 | Pimlico Cottage, Black Lane, Lover, Salisbury, SP5 2PQ, England |
| LISTON, Daniel Paul ACTIVE | Director | 01 Jul 2022 | | England | March 1983 | 185, Chippinghouse Road, Sheffield, South Yorkshire, S7 1DQ |
| MCGEEVOR, Katherine Anne ACTIVE | Director | 29 May 2009 | | England | November 1980 | Forty Hall Lodge, Forty Hill, Enfield, EN2 9HA, United Kingdom |
| BRADLEY, Suzanne Gail RESIGNED | Secretary | 18 May 2012 | 17 May 2013 | | | 185, Chippinghouse Road, Sheffield, South Yorkshire, S7 1DQ, England |
| CURTICE, Lisa Joan, Dr RESIGNED | Secretary | 15 May 2000 | 20 May 2011 | | | 2-R, 40 Queensborough Gardens, Glasgow, Lanarkshire, G12 9QS |
| ELVEN, Pamela May RESIGNED | Secretary | | 17 May 1999 | | | Camolin Birtley Rise, Bramley, Guildford, Surrey, GU5 0HZ |
| TROTTER, Henrietta Margaret RESIGNED | Secretary | 20 May 2011 | 18 May 2012 | | | Laverock Cottage, Buckthorns, Upper Largo, Leven, Fife, KY8 6EA, Scotland |
| TROTTER, Henrietta RESIGNED | Secretary | 17 May 1999 | 15 May 2000 | | | The Cottage, Boarhills, St Andrews, Fife, KY16 8PP |
| ADAMS, Lee, Professor RESIGNED | Director | 01 Oct 1998 | 01 Jul 2000 | England | September 1952 | 63 Bower Road, Sheffield, Yorkshire, S10 1ER |
| BARLOW, Kenneth Eliot, Dr RESIGNED | Director | | 18 Dec 1995 | | May 1906 | Shoulers End Back Street, Thornborough, Buckingham, Buckinghamshire, MK18 2DH |
| BORTON, Heda Barbara RESIGNED | Director | | 28 May 1993 | | April 1930 | Doubleton Farm House Doubleton Lane, Penshurst, Tonbridge, Kent, TN11 8JA |
| BRADLEY, Suzanne Gail RESIGNED | Director | | 16 May 2014 | United Kingdom | February 1946 | 185, Chippinghouse Road, Sheffield, South Yorkshire, S7 1DQ, England |
| BROWNE, Derek Stanley, Dr RESIGNED | Director | 01 Oct 1998 | 16 Dec 2020 | United Kingdom | September 1942 | Pastures New, Sway Road, Brockenhurst, Hants, SO42 7RX, United Kingdom |
| CHARKIN, Emily RESIGNED | Director | 15 Oct 2012 | 24 Feb 2025 | England | April 1982 | 185, Chippinghouse Road, Sheffield, South Yorkshire, S7 1DQ |
| CHARKIN, Emily RESIGNED | Director | 19 May 2012 | 20 May 2022 | England | April 1973 | Wilderness Wood, Main Road, Hadlow Down, Uckfield, East Sussex, TN22 4HJ, England |
| COLLINS, Anthony RESIGNED | Director | | 04 May 1992 | | April 1931 | 63 Betenson Avenue, Sevenoaks, Kent, TN13 3ER |
| CONISBEE, Molly Martha RESIGNED | Director | 19 May 2012 | 05 Jun 2015 | England | September 1972 | 7, Edward Street, Lower Weston, Bath, BA1 3BP, England |
| DONALD, Clive RESIGNED | Director | 23 May 2008 | 26 Feb 2011 | England | May 1950 | Dextra House, 8 Greenway, Aldridge, West Midlands, WS9 8XE |
| DONALDSON, Frances Annersley, Lady RESIGNED | Director | | 27 Mar 1994 | | January 1907 | 17 Edna Street, Battersea, London, SW11 3DP |
| DONALDSON, John George, Lord RESIGNED | Director | | 08 Mar 1998 | | October 1907 | 17 Edna Street, Battersea, London, SW11 3DP |
| ELVEN, Pamela May RESIGNED | Director | | 23 Jun 2006 | | August 1928 | Camolin Birtley Rise, Bramley, Guildford, Surrey, GU5 0HZ |
| FOST, Rosemary Jean Helen RESIGNED | Director | | 11 Mar 2013 | United Kingdom | July 1925 | Goldings, Town Littleworth, Lewes, East Sussex, BN8 4TD |
| HALL, Lesley Ann, Dr RESIGNED | Director | 20 May 2017 | 20 May 2022 | England | October 1949 | 76, Tytherton Road, London, N19 4QA, England |
| HANNAH, Margaret Clare RESIGNED | Director | 01 Jun 2010 | 01 Oct 2022 | Scotland | September 1961 | Cameron House, Cameron Lodge, Leven, Fife, KY8 5RG, United Kingdom |
| HANNON, Gerard Michael William RESIGNED | Director | 01 Oct 1998 | 23 Jun 2006 | Great Britain | May 1951 | 79a, Goddard Avenue, Swindon, Wiltshire, SN1 4HT |
| HILL, Stuart, Professor RESIGNED | Director | | 11 May 1998 | | April 1943 | PO BOX 326, Richmond, New South Wales, 2753, Australia |
| HOLLINGWORTH, Sumi RESIGNED | Director | 20 May 2011 | 05 Jun 2015 | United Kingdom | October 1980 | 14, Astbury Road, Peckham, London, SE15 2NJ, United Kingdom |
| LANGMAN, Mary Eleanor RESIGNED | Director | | 22 Apr 2004 | | August 1908 | North Cadbury Court, North Cadbury, Yeovil, Somerset, BA22 7DR |
| LOVEL, Hermione Jane RESIGNED | Director | 16 Jun 2005 | 31 May 2019 | England | December 1947 | 6, Church Hill, Purley, Surrey, CR8 3QN, United Kingdom |
| MACDONALD, Robert Garsden, Dr RESIGNED | Director | 21 May 2016 | 18 Nov 2018 | United Kingdom | November 1951 | 24, Abbotsford Gardens, Crosby, Liverpool, L23 3AP, England |
| MONTAGU, Iris Rachel, Hon Mrs RESIGNED | Director | | 28 Nov 1999 | | May 1903 | 24 Montrose Court, London, SW7 2QQ |
| OSBOURNE, Michael RESIGNED | Director | 01 Jun 1998 | 01 Nov 2010 | United Kingdom | October 1948 | 8, Comberemere Road, St Leonards On Sea, East Sussex, TN38 0RR, United Kingdom |
| PEPPER, Allan Drury RESIGNED | Director | | 01 Oct 1996 | | September 1920 | 3 Tangier Lane, Frant, Tunbridge Wells, Kent, TN3 9HD |
| PEPPER, Joan Amy RESIGNED | Director | | 31 May 2001 | | July 1915 | 3 Tangier Lane, Frant, Tunbridge Wells, Kent, TN3 9HD |
| POTTS, Ruth Jennifer RESIGNED | Director | 20 May 2011 | 01 May 2022 | England | April 1974 | 7, Edward Street, Lower Weston, Bath, BA1 3BP, England |
| RAJ, Arni Thara RESIGNED | Director | 16 Jun 2005 | 26 Feb 2011 | United Kingdom | May 1967 | House 22 Connaught Works, 251 Old Ford Road, London, E3 5PS |
| RAY, Peter RESIGNED | Director | | 01 Jul 2003 | | December 1941 | 4 Athenlay Road, Peckham, London, SE15 3EN |
| RIGLER, Malcolm Stuart, Dr RESIGNED | Director | 16 Jun 2005 | 17 Aug 2023 | England | June 1946 | Bracken House Saddlebow, Garway Hill, Orcop, Herefordshire, HR2 8HD |
| SCOTT-SAMUEL, Alex Jeremy Richard, Dr RESIGNED | Director | 04 Jul 1995 | 07 Jul 2017 | England | September 1947 | 218 Allerton Road, Mossley Hill, Liverpool, Merseyside, L18 6JN |
| STALLIBRASS, Alison RESIGNED | Director | | 04 Jul 1999 | | September 1916 | Turkey Island Corner, East Harting, Petersfield, Hampshire, GU31 5LT |
| TROTTER, Christopher Heward RESIGNED | Director | 23 Jun 2006 | 28 Nov 2018 | Scotland | September 1957 | Buckthorns, Upper Largo, Leven, Fife, KY8 5EA |
| TROTTER, Henrietta RESIGNED | Director | | 17 Oct 2019 | United Kingdom | September 1928 | Laverock Cottage, Buckthorns, Upper Largo, Fife, KY8 6EA |
| TUNNICLIFFE, Susan Dale, Dr The Lady RESIGNED | Director | 23 Jun 2006 | 28 Apr 2009 | England | February 1946 | 18 Octavia, Bracknell, Berkshire, RG12 7YZ |
| TWELL, Linda Susan Mary RESIGNED | Director | 27 May 2002 | 23 May 2008 | | April 1951 | 68 Tennyson Avenue, Kings Lynn, Norfolk, PE30 2QJ |
| WILLIAMSON, Lorne Guthrie Bruce RESIGNED | Director | | 20 May 2011 | England | August 1938 | 97 Chesterton Road, Cambridge, CB4 3AP |
| WITCHALLS, James, Dr RESIGNED | Director | | 01 Jul 2000 | | August 1939 | Maddox Farm, Little Bookham, Surrey, KT23 3BU |