| HOUSTON, James ACTIVE | Secretary | 08 Nov 2024 | | | | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| BATTERSBY, Dean ACTIVE | Director | 01 Jun 2020 | | England | November 1966 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| HOUSTON, James Alexander ACTIVE | Director | 08 Nov 2024 | | England | December 1982 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| MAYER, Joerg Friedrich ACTIVE | Director | 01 Jan 2021 | | Germany | May 1974 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| WRIGHT, Lee Robert ACTIVE | Director | 02 Jan 2019 | | England | November 1971 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| BURNINGHAM, Derek RESIGNED | Secretary | 01 Mar 1995 | 06 Dec 1996 | | | 58 Brooklands Way, Redhill, Surrey, RH1 2BW |
| FIELDING, Kelly RESIGNED | Secretary | 01 Mar 1995 | 22 Dec 1995 | | | 6 Friars Stile Place, Richmond, Surrey, TW10 6NL |
| GARFITT, Anthony RESIGNED | Secretary | 11 Apr 1997 | 31 Jul 1998 | | | 16 Mill Lane, Cottesmore, Oakham, Leicestershire, LE15 7DL |
| MCCREADIE, Ian Stuart RESIGNED | Secretary | 01 Aug 1998 | 29 Feb 2016 | | | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| MCCREADIE, Ian Stuart RESIGNED | Secretary | 01 Jul 1992 | 03 Oct 1994 | | | 2 Fullerton Close, Millbrooke Skellow, Doncaster, South Yorkshire, DN6 8RU |
| PHILLIPS, Colin Frederick RESIGNED | Secretary | | 31 Mar 1992 | | | 21 Weetwood Drive, Sheffield, South Yorkshire, S11 9QL |
| SHEPHERD, Roz Ann RESIGNED | Secretary | 01 Mar 2016 | 29 Oct 2024 | | | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| BLAW DUCTS LIMITED RESIGNED | Secretary | 05 Dec 1996 | 11 Apr 1997 | | | Caradon House 24 Queens Road, Weybridge, Surrey, KT13 9UX |
| BRAYSHAW, Nicholas Paul RESIGNED | Director | 08 Dec 1993 | 29 Dec 1994 | | June 1955 | 116 Chessetts Wood Roal, Lapworth, Warwickshire, B94 6EL |
| BRIX, Klaus RESIGNED | Director | 14 Oct 2011 | 28 Feb 2022 | Germany | October 1957 | Munketoft 42, Flensburg, 24937, Germany |
| BROWN, Philip Crabtree RESIGNED | Director | | 08 Dec 1993 | | June 1950 | 19 Lakeland Drive, Alwoodley, Leeds, West Yorkshire, LS17 7PJ |
| CURTIS, Mervyn Charles RESIGNED | Director | 01 May 1992 | 01 Dec 1996 | | October 1959 | 2 Old Forge Road, Misterton, Doncaster, South Yorkshire, DN10 4BL |
| DAVIES, Andrew Paul RESIGNED | Director | 01 May 2006 | 30 Nov 2009 | | October 1963 | 2 Ascot Drive, Cusworth, Doncaster, South Yorkshire, DN5 8QA |
| DE VILLIERS, Michael Charles RESIGNED | Director | 01 Jan 1996 | 30 Nov 2002 | | January 1952 | 133 Windsor Road, Carlton In Lindrick, Worksop, Nottinghamshire, S81 9DH |
| FISCHER, Andrew Olaf RESIGNED | Director | 05 Dec 1996 | 14 Oct 2011 | United Kingdom | August 1964 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| FISHER, Ian RESIGNED | Director | 05 Dec 1996 | 14 Oct 2011 | United Kingdom | August 1950 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| FLETCHER, Alan Thomas RESIGNED | Director | 05 Dec 1996 | 14 Oct 2011 | United Kingdom | December 1934 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| HALLAM, Paul RESIGNED | Director | 01 May 2006 | 30 Nov 2009 | | March 1955 | Lochindorb The Close, Averham, Nottinghamshire, NG23 5RP |
| JACKSON, Douglas RESIGNED | Director | 05 Sep 1994 | 30 Nov 1995 | England | July 1952 | 54 Highclare, Bewdley, Worcestershire, DY12 2EY |
| KUTSCHINSKI, Torsten Heinz RESIGNED | Director | 14 Oct 2011 | 31 Dec 2020 | Germany | May 1962 | Munketoft 42, Flensburg, 24937, Germany |
| LIGHTFOOT, Timothy James RESIGNED | Director | | 31 Dec 1994 | England | January 1948 | 81 Sparken Hill, Worksop, Nottinghamshire, S80 1AL |
| MCCALL, Peter Terence RESIGNED | Director | 01 May 2006 | 31 Jul 2018 | England | August 1959 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| MCCAUGHEY, Mark Christopher RESIGNED | Director | 01 May 2006 | 31 May 2020 | United Kingdom | April 1961 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| MCCREADIE, Ian Stuart RESIGNED | Director | 01 Jul 1992 | 29 Feb 2016 | United Kingdom | December 1957 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| PHILLIPS, Colin Frederick RESIGNED | Director | | 31 Mar 1992 | | April 1941 | 21 Weetwood Drive, Sheffield, South Yorkshire, S11 9QL |
| RICHARDSON, Jonathan Charles RESIGNED | Director | 19 Jun 2006 | 14 Oct 2011 | England | November 1960 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| RILEY, Anthony James RESIGNED | Director | 29 Dec 1994 | 15 Mar 1996 | | September 1949 | 19 Firbank, Euxton, Chorley, Lancashire, PR7 6HP |
| SHEPHERD, Roz Ann RESIGNED | Director | 01 Jan 2016 | 29 Oct 2024 | England | June 1967 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| SHORTER, Simon Mervyn RESIGNED | Director | 01 May 2006 | 20 Feb 2022 | United Kingdom | November 1962 | Holbrook Rise, Holbrook Industrial Estate, Sheffield, S20 3GE |
| SMITH, Stephen Anthony RESIGNED | Director | | 20 Jun 2003 | | August 1951 | 12 Chestnut Avenue, Northwood, Middlesex, HA6 1HR |
| SNOWDON, Robert William RESIGNED | Director | 17 Mar 2003 | 14 Jun 2004 | England | December 1962 | 11 Well Close, Addingham, Ilkley, West Yorkshire, LS29 0SH |
| WALKERDINE, Michael David RESIGNED | Director | 29 Dec 1994 | 01 Sep 1995 | | May 1949 | White Acre Rectory Walk, Gamston, Retford, Nottinghamshire, DN22 0QE |
| WALKERDINE, Michael David RESIGNED | Director | | 01 Jul 1992 | | May 1949 | 40 Beckford Road, Alderton, Tewkesbury, Gloucestershire, GL20 8NL |
| WHEELER, Simon Crane RESIGNED | Director | 29 Dec 1994 | 06 Dec 1996 | | September 1944 | Pond Oast Postern Park Farm, Postern Lane, Tonbridge, Kent, TN11 0QT |
| WILLANS, John Richard David RESIGNED | Director | | 08 Dec 1993 | | May 1943 | Field Cottage, Flaunden, Hemel Hempstead, Hertfordshire, HP3 0PP |