| BOSMA, Jark Jan Daniel ACTIVE | Secretary | 03 Oct 2023 | | | | Flat 3 Beechfield House, 25 Broomhall Road, Sheffield, S10 2DR, England |
| BOSMA, Jark Jan Daniel ACTIVE | Director | 03 Oct 2023 | | England | June 1962 | Flat 3 Beechfield House, 25 Broomhall Road, Sheffield, S10 2DR, England |
| HENSON, John Leslie ACTIVE | Director | 01 Sep 2014 | | United Kingdom | July 1942 | Flat 2 Beechfield House, 25 Broomhall Road, Sheffield, S10 2DR, England |
| ROWE, Jeremy Geraint ACTIVE | Director | 05 Dec 2003 | | England | July 1963 | Flat 1 Beechfield House, 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| COWDREY, Michael Derek RESIGNED | Secretary | 22 Nov 1998 | 17 Oct 2002 | | | Flat 1 Beechfield House, 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| FITZSIMMONS, Pamela Anne RESIGNED | Secretary | 17 Oct 2002 | 05 Dec 2003 | | | Flat 4 Beechfield House, 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| HORTON, Desmond Keight RESIGNED | Secretary | | 29 Jun 1999 | | | Beechield House 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| ROWE, Jeremy Geraint RESIGNED | Secretary | 05 Dec 2003 | 03 Oct 2023 | | | Flat 1 Beechfield House, 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| BOOTS, Michael, Dr RESIGNED | Director | 01 Dec 2007 | 01 Mar 2012 | England | December 1964 | Flat 2 Beechfield House, 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| CORMACK, Paul, Professor RESIGNED | Director | 01 Mar 2012 | 01 Sep 2014 | England | June 1949 | Beechfield House, Flat 2, 25 Broomhall Rd, Sheffield, S10 2DR, England |
| COWDREY, Michael Derek RESIGNED | Director | 22 Nov 1998 | 17 Oct 2002 | | March 1933 | Flat 1 Beechfield House, 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| FITZSIMMONS, Pamela Anne RESIGNED | Director | | 05 Dec 2003 | | September 1941 | Flat 4 Beechfield House, 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| FOSTER, James Matthew RESIGNED | Director | 08 Jun 1999 | 01 Dec 2005 | | March 1972 | Flat 2 Beechfield House, 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| HORTON, Desmond Keight RESIGNED | Director | | 22 Nov 1998 | | June 1929 | Beechield House 25 Broomhall Road, Sheffield, South Yorkshire, S10 2DR |
| WILKIE, Douglas John Kenneth, Dr RESIGNED | Director | | 12 Jan 2006 | | June 1921 | Flat 3 Beechfield House, 25 Broomhall Road, Sheffield, S Yorkshrie, S10 2DR |