| GREEN, Martin James Patrick ACTIVE | Secretary | 01 Jul 2016 | | | | Leader House, Surrey Street, Sheffield, S1 2LH, England |
| BURMAN, Peter Ashley Thomas Insull, Dr ACTIVE | Director | 15 Jun 2018 | | Scotland | September 1944 | Leader House, Surrey Street, Sheffield, S1 2LH, England |
| CLEAVER, Mark James ACTIVE | Director | 18 Jun 2021 | | Wales | June 1973 | Meersbrook Hall, Brook Rd, Sheffield, South Yorkshire, S8 9FL, England |
| DICKINSON, Rachel Miriam Wilson, Dr ACTIVE | Director | 14 Nov 2014 | | England | September 1972 | Leader House, Surrey Street, Sheffield, S1 2LH, England |
| JOHNSON, Janet Nichola, Ms. ACTIVE | Director | 23 Mar 2018 | | England | May 1945 | Leader House, Surrey Street, Sheffield, S1 2LH, England |
| O'CONNOR, Frances Patricia, Dr ACTIVE | Director | 16 Sep 2023 | | United Kingdom | July 1962 | Leader House, Surrey Street, Sheffield, S1 2LH, England |
| ROBBINS, Jennifer Mary ACTIVE | Director | 07 Nov 2015 | | United Kingdom | October 1965 | Leader House, Surrey Street, Sheffield, S1 2LH, England |
| WIELGOPOLAN, Dominika ACTIVE | Director | 21 Nov 2025 | | Scotland | October 1985 | Leader House, Surrey Street, Sheffield, S1 2LH, England |
| CORDERY, John Peter RESIGNED | Secretary | | 03 Oct 1992 | | | Bluebell Cottage Bluebell Close, Barnards Green, Malvern, Worcestershire, WR14 3QR |
| EAGLES, Stuart Mark, Dr RESIGNED | Secretary | 16 Nov 2012 | 30 Jun 2016 | | | Uncllys Farm, Ruskin Land, Tanners Hill, Bewdley, Worcestershire, DY12 2LR, England |
| HOBBS, Norman Carne RESIGNED | Secretary | 21 Mar 2007 | 16 Nov 2012 | | | Clove Cottage, Mitten Road, Bembridge, Isle Of Wight, PO35 5UP |
| QUAYLE, Christopher Cedric, Dr RESIGNED | Secretary | 20 Feb 1993 | 18 Jan 2007 | | | Bowcastle Farm, Bewdley, Worcs, DY12 2LN |
| BARNES, Janet RESIGNED | Director | 26 Nov 1994 | 01 Jan 2018 | England | April 1952 | 27 Westbourne Road, Sheffield, South Yorkshire, S10 2QQ |
| BARRIE, Charles David Ogilvy RESIGNED | Director | 16 Jan 1992 | 08 Oct 2004 | England | November 1953 | 13 Wingate Road, Hammersmith, London, W6 0UR |
| BUTTERWORTH, Carolyn Jane RESIGNED | Director | 15 Jun 2018 | 21 Jan 2021 | England | June 1968 | Meersbrook Hall, Brook Rd, Sheffield, South Yorkshire, S8 9FL, England |
| CONSTANTINE, Frank, Doctor RESIGNED | Director | | 12 Nov 2005 | | February 1919 | 33 Botanical Road, Sheffield, South Yorkshire, S11 8RP |
| DEARDEN, James, Dr RESIGNED | Director | | 14 Nov 2014 | England | August 1931 | 4 Woodlands, Foreland Road, Bembridge, Isle Of Wight, PO35 5RX |
| FROST, Mark Andrew, Dr RESIGNED | Director | 18 Jun 2021 | 06 Sep 2023 | England | October 1969 | Meersbrook Hall, Brook Rd, Sheffield, South Yorkshire, S8 9FL, England |
| HARRIS, Anthony RESIGNED | Director | | 28 Sep 1996 | | June 1931 | 16a Hillside Road, St Albans, Hertfordshire, AL1 3QL |
| HARRIS, Christopher Alexander RESIGNED | Director | 18 Nov 2011 | 21 Nov 2020 | United Kingdom | September 1963 | Meersbrook Hall, Brook Rd, Sheffield, South Yorkshire, S8 9FL, England |
| HARVEY, Mark RESIGNED | Director | | 24 Oct 2006 | | November 1921 | The Limes, Sinnington, Yorkshire, YO6 6RZ |
| HULL, Howard Antony RESIGNED | Director | 02 Nov 2018 | 18 Jun 2021 | United Kingdom | November 1953 | Meersbrook Hall, Brook Rd, Sheffield, South Yorkshire, S8 9FL, England |
| ILES, John Graham RESIGNED | Director | 19 Apr 2006 | 20 Nov 2021 | United Kingdom | May 1951 | 0, Uncllys Farm, Ruskin Land, Bewdley, Worcestershire, DY12 2LR, United Kingdom |
| JENKIN, Ian Evers Tregarthen RESIGNED | Director | | 20 Nov 1999 | | June 1920 | Barn Cottage Grove Farm, Fifield, Maidenhead, Berkshire, SL6 2PF |
| JEWELL, Andrew RESIGNED | Director | | 20 Nov 1999 | | August 1918 | Little Skitch Poundfield Lane Stratton, Bude, Cornwall, EX23 9BS |
| KING, Henry Walter RESIGNED | Director | | 27 Dec 1993 | | March 1916 | Sheilings 52 Bretforton Road, Badsey, Evesham, Worcestershire, WR11 5UQ |
| MILLER, Peter Bardsea RESIGNED | Director | 22 Nov 2003 | 25 Nov 2023 | England | April 1947 | 10 St. Oswalds Road, York, YO10 4PF |
| PAGE, Anthony Matthews RESIGNED | Director | 06 Jun 1995 | 21 Mar 2007 | | July 1928 | 8a Riverside Road, St Albans, Hertfordshire, AL1 1SD |
| QUAYLE, Christopher Cedric, Dr RESIGNED | Director | 21 Mar 2007 | 14 Nov 2014 | England | July 1941 | Bowcastle Farm, Bewdley, Worcs, DY12 2LN |
| QUAYLE, Christopher Cedric, Dr RESIGNED | Director | | 20 Feb 1993 | England | July 1941 | Bowcastle Farm, Bewdley, Worcs, DY12 2LN |
| SPALDING, Julian, Doctor RESIGNED | Director | | 12 Nov 2005 | | June 1947 | 90 Grassmarket, Edinburgh, EH1 2JR |
| SPIERS, John Raymond RESIGNED | Director | 10 Nov 2001 | 08 Oct 2004 | England | September 1941 | The Gate Cottage, Twyford Birch Grove, Haywards Heath, Sussex, RH17 7DJ |
| WHEELER, Michael David, Professor RESIGNED | Director | 13 Nov 2004 | 18 Jan 2007 | United Kingdom | September 1947 | Flintstone, Hurst Lane Owslebury, Winchester, Hampshire, SO21 1JQ |
| WILMER, Clive RESIGNED | Director | 13 Nov 2004 | 16 Nov 2019 | England | February 1945 | 57 Norwich Street, Cambridge, Cambridgeshire, CB2 1ND |
| WILSON, Robert Alfred RESIGNED | Director | 29 Sep 2007 | 24 Sep 2016 | United Kingdom | February 1935 | 0, The Old Sudeley Arms, 21-23 Hailes Street, Winchcombe, Gloucestershire, GL54 5HU, United Kingdom |
| YALLOP, Jacqueline RESIGNED | Director | 18 Mar 2011 | 24 Jun 2016 | Wales | January 1969 | English Dept Hugh Owen Building, Penglais Campus, University Of Aberystwyth, Aberystwyth, Dyfed, SY23 3DY, Wales |