| BYROM, Peter Richard ACTIVE | Director | 21 Jun 2025 | | England | January 1965 | 25, Storrs Hall Road, Sheffield, S6 5AW, England |
| COLENSO, Lucy Elizabeth ACTIVE | Director | 05 Nov 2016 | | United Kingdom | August 1964 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| ESPINASSE, Pierre Manuel Jacques ACTIVE | Director | 21 May 2025 | | England | July 1962 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| KENNEDY CARRAGHER, Veronica Jane ACTIVE | Director | 11 May 2022 | | England | March 1965 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| STONE, Emma Louise ACTIVE | Director | 20 Nov 2024 | | England | May 1987 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| BARTON, Charles Ernest RESIGNED | Secretary | 23 Sep 1995 | 24 Feb 1997 | | | 118 Mendip Road, Hayley Green, Halesowen, West Midlands, B63 1JE |
| BATES, Herbert Geoffrey Charles, Dr RESIGNED | Secretary | 29 Apr 2000 | 12 Oct 2002 | | | 5 Tellisford, Esher, Surrey, KT10 8AE |
| BRATBY, Roy Douglas RESIGNED | Secretary | 06 Jun 2009 | 09 Jun 2010 | | | 26 The Park, St Albans, Hertfordshire, AL1 4RY |
| BROOKS-JOHNSON, Alexander John RESIGNED | Secretary | 09 Sep 2024 | 27 Mar 2026 | | | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| DAVIES, Douglas Hugh RESIGNED | Secretary | 28 Jan 1995 | 23 Sep 1995 | | | 42 Eastfield, Westbury On Trym, Bristol, BS9 4BE |
| FENN, Nicholas Patrick RESIGNED | Secretary | 02 Apr 2005 | 24 Dec 2008 | | | 37 School Road, West Wellow, Romsey, Hampshire, SO51 6AR |
| HEDLEY CRAIKE, John Anthony RESIGNED | Secretary | 02 Aug 1997 | 29 Apr 2000 | | | Bollin Ridge Derwent Lane, Hathersage, Sheffield, S32 1AS |
| JEFFRIES, Anthony James RESIGNED | Secretary | 15 Apr 1997 | 19 Sep 1998 | | | 12 Caithness Road, Liverpool, L18 9SL |
| KIDGELL, Ivan Raymond RESIGNED | Secretary | 12 Oct 2002 | 02 Apr 2005 | | | 35 Knighton Drive, Woodford Wells, Essex, IG8 0RN |
| SAVAGE, Caroline RESIGNED | Secretary | 23 Jan 2023 | 09 Feb 2024 | | | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| SCARR, Margaret RESIGNED | Secretary | 23 Apr 1992 | 31 Dec 1992 | | | 34 Chesterwood Drive, Sheffield, South Yorkshire, S10 5DU |
| STOCKDALE, David James RESIGNED | Secretary | 09 Jun 2010 | 21 Nov 2022 | | | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| TELFER, Roy RESIGNED | Secretary | 24 Apr 1993 | 24 Sep 1994 | | | 151 Eden Lane, Peterlee, County Durham, SR8 5DS |
| THOMAS, Deanne Marie RESIGNED | Secretary | 21 Nov 2022 | 20 Jan 2023 | | | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| ANDERSON, Mark Charles RESIGNED | Director | 21 Sep 1996 | 08 Jun 1997 | | October 1963 | 63 Fairways 192 Dyke Road, Brighton, Sussex, BN1 5AD |
| ANDERSON, William RESIGNED | Director | 23 Apr 1992 | 23 Sep 1995 | | November 1932 | 2 Fitzroy Drive, Leeds, West Yorkshire, LS8 1RW |
| BARTON, Charles Ernest RESIGNED | Director | 23 Sep 1995 | 24 Feb 1997 | | March 1929 | 118 Mendip Road, Hayley Green, Halesowen, West Midlands, B63 1JE |
| BATES, Herbert Geoffrey Charles, Dr RESIGNED | Director | 23 Nov 1996 | 04 Sep 1999 | | | 5 Tellisford, Esher, Surrey, KT10 8AE |
| BOWLES, James Michael RESIGNED | Director | 23 Sep 1995 | 10 Jan 1998 | | December 1938 | 5 Worcester Drive, Sheffield, Yorkshire, S10 4JG |
| BRATBY, Roy Douglas RESIGNED | Director | 04 Sep 2008 | 23 Sep 2014 | United Kingdom | August 1937 | 26 The Park, St Albans, Hertfordshire, AL1 4RY |
| BRATBY, Roy Douglas RESIGNED | Director | 12 Oct 2002 | 30 Jan 2005 | United Kingdom | August 1937 | 26 The Park, St Albans, Hertfordshire, AL1 4RY |
| BUFFIN, John Terence RESIGNED | Director | 23 Aug 2006 | 03 Sep 2009 | | August 1930 | 721 Abbey Lane, Sheffield, South Yorkshire, S11 9ND |
| CHEESERIGHT, Kevin RESIGNED | Director | 04 Sep 1999 | 15 Sep 2001 | | October 1951 | 23 Byron Road, Sheffield, S7 1RY |
| CLAPPERTON, John Reginald RESIGNED | Director | 23 Sep 1995 | 21 Sep 1996 | | March 1931 | 2 Pearce Grove, Edinburgh, EH12 8SP |
| COLES, Robert Ross Adlard, Dr RESIGNED | Director | 23 Sep 1995 | 01 Nov 1997 | England | December 1927 | 22 Humber Road, Beeston, Nottingham, Nottinghamshire, NG9 2EF |
| CORCORAN, James Bernard RESIGNED | Director | 24 Feb 2021 | 24 Nov 2025 | England | December 1954 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| DANBY, John Edgar RESIGNED | Director | 23 Apr 1992 | 31 Oct 1992 | | October 1920 | 63 Lower Manor Lane, Burnley, Lancashire, BB12 0EF |
| DAVIES, Douglas Hugh RESIGNED | Director | 23 Sep 1995 | 21 Sep 1996 | | January 1922 | 42 Eastfield, Westbury On Trym, Bristol, BS9 4BE |
| DAVIES, William Ewart, Doctor RESIGNED | Director | 25 May 2002 | 28 Sep 2011 | England | October 1938 | 53 Croftdown Road, Harborne, Birmingham, West Midlands, B17 8RE |
| DELLER, Patricia Anne RESIGNED | Director | 09 Sep 2010 | 14 Apr 2011 | United Kingdom | September 1955 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| DODD, Simon John RESIGNED | Director | 12 Feb 2020 | 30 Nov 2023 | England | September 1962 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| DYER, Peter Bernard RESIGNED | Director | 23 Sep 1995 | 21 Sep 1996 | | October 1953 | 37 Cogley Lane, Bingham, Nottingham, Nottinghamshire, NG13 8DE |
| DYSON, James Hiram Paul RESIGNED | Director | 30 Jul 2014 | 14 Sep 2018 | England | July 1950 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| EDGE, James Andrew RESIGNED | Director | 04 Sep 1999 | 15 Sep 2001 | | October 1953 | 5 New Road, Dinnington, Sheffield, South Yorkshire, S25 2QT |
| FRAY, Martyn George RESIGNED | Director | 14 Sep 2009 | 25 Sep 2013 | United Kingdom | May 1947 | 39 Swingbridge Street, Foxton, Market Harborough, Leicestershire, LE16 7RH |
| FRY, Christopher James RESIGNED | Director | 23 Dec 2009 | 08 May 2013 | United Kingdom | March 1976 | Farm, Buildings, Washfield Lane Treeton, Rotherham, South Yorkshire, S60 5PU, United Kingdom |
| GERAGHTY, Annie Rose Frances Mary, Dr RESIGNED | Director | 05 Nov 2016 | 09 Nov 2022 | England | September 1983 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| GILLON, Lynne RESIGNED | Director | 26 Jan 2019 | 29 Nov 2024 | England | May 1952 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| GOODER, Peter RESIGNED | Director | 16 Feb 2008 | 17 Jul 2008 | | February 1943 | Old Newshams Off Stoneygate Lane, Knowle Green, Preston, Lancashire, PR3 2ZS |
| GRIMES, Sandy RESIGNED | Director | 23 Sep 1995 | 04 Sep 1999 | | March 1959 | 57 Welbeck Road, Doncaster, South Yorkshire, DN4 5EX |
| HALL, Deborah Ann, Professor RESIGNED | Director | 28 Sep 2011 | 23 Sep 2014 | Uk | September 1970 | Ground Floor, Unit 5, Acorn Business Park Woodseats Close, Sheffield, South Yorkshire, S8 0TB, United Kingdom |
| HANDSCOMB, Lucy Elizabeth RESIGNED | Director | 31 Oct 2015 | 26 Jun 2024 | England | March 1971 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| HARRIS, Jackie Anne RESIGNED | Director | 30 Jul 2014 | 14 Sep 2018 | England | July 1953 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| HARRISON, John Trevor RESIGNED | Director | 12 Oct 2002 | 11 Nov 2006 | England | July 1939 | Woodcote, 1b Harmer Dell, Welwyn, Hertfordshire, AL6 0BE |
| HARTLE, Harry RESIGNED | Director | 23 Sep 1995 | 02 Sep 2000 | | February 1921 | 345 Fullwell Avenue, Clayhall, Ilford, Essex, IG5 0RR |
| HAZELBY, Jo RESIGNED | Director | 19 Sep 1998 | 25 May 2002 | | November 1922 | 2 Viscount Road, Staines, Middlesex, TW19 7RD |
| HAZELBY, Jo RESIGNED | Director | 23 Sep 1995 | 10 Jan 1998 | | November 1922 | 2 Viscount Road, Staines, Middlesex, TW19 7RD |
| HERON, Nicola, Dr RESIGNED | Director | 09 Nov 2022 | 24 Nov 2025 | England | October 1971 | Unit 5, Acorn Business Park, Woodseats Close, Sheffield, S8 0TB, England |
| HODSON, Julia RESIGNED | Director | 17 May 2014 | 13 Sep 2019 | England | February 1957 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| HOOPER, Marjorie May RESIGNED | Director | 24 Apr 1993 | 01 Oct 1996 | | February 1928 | 161 Cromwell Lane, The Hill, Coventry, Warwickshire, CV4 8AN |
| HOWARD, George William RESIGNED | Director | 23 Sep 1995 | 10 Jan 1998 | | April 1924 | 109 South Ella Way, Kirk Ella, Hull, North Humberside, HU10 7LZ |
| JEFFRIES, Anthony James RESIGNED | Director | 22 Feb 1997 | 02 Aug 1997 | | | 12 Caithness Road, Liverpool, L18 9SL |
| KIRKBRIDE, Eleni RESIGNED | Director | 23 Sep 1995 | 21 Sep 1996 | | July 1944 | 116 St Johns Road, Isleworth, Middlesex, TW7 6PL |
| LAMBERT, Beryl Lavender RESIGNED | Director | 19 Sep 1998 | 04 Sep 1999 | | April 1932 | Hodge Pound Lane, Hurst, Reading, Berkshire, RG10 0RS |
| LAMBERT, Beryl Lavender RESIGNED | Director | 23 Sep 1995 | 10 Mar 1997 | | April 1932 | Hodge Pound Lane, Hurst, Reading, Berkshire, RG10 0RS |
| LEES, John Alfred RESIGNED | Director | 23 Apr 1992 | 28 Jan 1993 | | March 1923 | 48 Whittingham Road, Mapperley, Nottingham, Nottinghamshire, NG3 6BJ |
| LYTTLE, Victor Michael Clements RESIGNED | Director | 16 Feb 2008 | 03 Sep 2009 | United Kingdom | February 1943 | Heathcote House 136 Hagley Road, Birmingham, B16 9PN |
| MCFERRAN, Donald John RESIGNED | Director | 08 May 2013 | 07 Oct 2021 | United Kingdom | November 1957 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| MCGREGOR, Gloria Anne RESIGNED | Director | 12 Oct 2002 | 10 Jun 2005 | | January 1944 | 9 Maypole Close, Saffron Walden, Essex, CB11 4DB |
| MILLER, Simon Robert RESIGNED | Director | 14 Sep 2018 | 07 Oct 2021 | England | May 1968 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| MITCHELL, Mark RESIGNED | Director | 15 Sep 2001 | 11 Sep 2004 | | September 1970 | 288 Newburgh Circle, Bridge Of Don, Aberdeen, AB22 8XB |
| MORRIS, William Harold RESIGNED | Director | 01 Oct 2005 | 03 Jul 2008 | | February 1947 | 36 Horseshoes Way, Brampton, Huntingdon, Cambridgeshire, PE28 4TN |
| NASH, Philip John Lester RESIGNED | Director | 14 Apr 2011 | 14 Sep 2018 | United Kingdom | February 1950 | Unit 5, Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB, United Kingdom |
| O'TOOLE, Michael RESIGNED | Director | 23 Sep 1995 | 21 Sep 1996 | | February 1934 | 15 Wrottesley Road, London, SE18 3EW |
| PALFREE, Michael John RESIGNED | Director | 07 Jun 1997 | 04 Sep 1999 | | January 1949 | 6 Ludham Gardens, Newbold, Chesterfield, Derbyshire, S41 8SP |
| PERRY, Ann RESIGNED | Director | 14 Sep 2006 | 30 Nov 2008 | | February 1939 | 83 Main Street, Austrey, Atherstone, CV9 3EG |
| SHAPIRO, Jack RESIGNED | Director | 24 Apr 1993 | 12 Oct 2002 | | July 1916 | 100 Brim Hill, London, N2 0EY |
| SMEDLEY, Joseph RESIGNED | Director | 12 Oct 2002 | 29 May 2006 | | May 1931 | 1 Delapre Road, Weston Super Mare, Avon, BS23 4NS, England |
| SPENCER, Ivan Marcourt RESIGNED | Director | 29 Apr 2000 | 12 Oct 2002 | | February 1947 | 56 Fruitlands, Malvern, Worcestershire, WR14 4XA |
| STANDERWICK, Michael Spencer RESIGNED | Director | 01 Oct 2005 | 14 Aug 2008 | Great Britain | May 1944 | 16 Warwick Square, London, SW1V 2AB |
| SUTHERLAND, Judith Lynn, Dr RESIGNED | Director | 28 Jul 2011 | 06 Nov 2013 | Uk | July 1963 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| SWART, Gerhard RESIGNED | Director | 06 Nov 2021 | 31 Jul 2023 | England | August 1978 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| TAYLOR, David Leslie RESIGNED | Director | 14 Sep 2006 | 04 Jun 2009 | | August 1946 | 14 Main Street, Heather, Coalville, Leicestershire, LE67 2QP |
| TELFER, Roy RESIGNED | Director | 23 Sep 1995 | 21 Sep 1996 | | May 1933 | 151 Eden Lane, Peterlee, County Durham, SR8 5DS |
| THOMAS, Deanne Marie RESIGNED | Director | 21 Nov 2022 | 21 Nov 2022 | England | June 1969 | Unit 5 Acorn Business Park, Woodseats Close, Sheffield, South Yorkshire, S8 0TB |
| TINLEY, Helen RESIGNED | Director | 23 Sep 1995 | 21 Sep 1996 | | June 1948 | 188 Main Road, Duston, Northampton, NN5 6RE |
| TROWSDALE, Eric RESIGNED | Director | 15 Sep 2001 | 09 Sep 2010 | United Kingdom | July 1943 | 3 Pilkington Avenue, Sutton Coldfield, West Midlands, B72 1LA |
| TROWSDALE, Eric RESIGNED | Director | 23 Sep 1995 | 04 Sep 1999 | United Kingdom | July 1943 | 3 Pilkington Avenue, Sutton Coldfield, West Midlands, B72 1LA |
| TROWSDALE, Eric RESIGNED | Director | 24 Apr 1993 | 29 Apr 1994 | United Kingdom | July 1943 | 3 Pilkington Avenue, Sutton Coldfield, West Midlands, B72 1LA |
| TUNGLAND, Ole Petter, Dr RESIGNED | Director | 21 Feb 2009 | 28 Sep 2011 | United Kingdom | November 1944 | 5 Balmoak Lane, Tapton, Chesterfield, Derbyshire, S41 0TH |
| VAN PUYENBROEK, John RESIGNED | Director | 23 Apr 1992 | 24 Apr 1993 | | June 1918 | 71 Lockharton Avenue, Craiglockhart, Edinburgh, Midlothian, EH14 1BB |
| WARNER, Clive Howard RESIGNED | Director | 12 Feb 2014 | 06 Nov 2021 | England | May 1952 | 5, Hankins Lane, London, NW7 3AA, England |
| WEST, Gareth RESIGNED | Director | 29 Apr 2000 | 12 Oct 2002 | | September 1947 | 11 Anglesey Close, Tonteg, Pontypridd, Mid Glamorgan, CF38 1LY |
| WHEELER, Peter David, Dr RESIGNED | Director | 21 Feb 2009 | 22 Sep 2016 | United Kingdom | September 1943 | Chepping Cottage, Rays Lane, Penn, Bucks, HP10 8LH |
| WHYTE, Alan James RESIGNED | Director | 29 Jul 2000 | 11 Sep 2004 | | January 1949 | 7 Gallowden Avenue, Arbroath, Angus, DD11 3EX |
| WYTON, Barry RESIGNED | Director | 15 Sep 2001 | 21 Feb 2007 | England | February 1954 | 8 Brooklands Close, Daventry, Northamptonshire, NN11 4AT |