| BYERLEY, Paul Richard Athol ACTIVE | Director | 06 Feb 2020 | | England | October 1981 | Solid Solutions Management Limited, Building 500, Abbey Park, Stareton, Kenilworth, Warwickshire, CV8 2LY, England |
| SAMPSON, Alan John ACTIVE | Director | 14 Mar 2016 | | United Kingdom | November 1960 | Solid Solutions Management Limited, Building 500, Abbey Park, Stareton, Kenilworth, Warwickshire, CV8 2LY, England |
| BRODDLE, David RESIGNED | Secretary | 27 Apr 2006 | 14 Mar 2016 | | | High View The Green, Froggatt, Sheffield, S30 1ZA |
| LOB, Alexander Graham James RESIGNED | Secretary | 28 Aug 1993 | 03 Jun 1999 | | | Green Eaves New Road, Prestbury, Macclesfield, Cheshire, SK10 4HP |
| LYNE, Barry Malcolm RESIGNED | Secretary | 03 Jun 1999 | 27 Apr 2006 | | | Westfields, High Street, Holme, NG23 7RZ |
| LYNE, Barry Malcolm RESIGNED | Secretary | | 28 Aug 1993 | | | The Well House Kishfield Lane, Kettleshulme, Stockport, Cheshire, SK12 7RB |
| SAMPSON, Katharine RESIGNED | Secretary | 14 Mar 2016 | 24 Jun 2022 | | | Solid Solutions Management Limited, Building 500, Abbey Park, Stareton, Kenilworth, Warwickshire, CV8 2LY, England |
| BEHRENS, Allan David RESIGNED | Director | 28 Aug 1993 | 31 Jan 2002 | England | April 1959 | The Chimes Taxal, Whaley Bridge, Stockport, Cheshire, SK12 7DY |
| BRODDLE, David RESIGNED | Director | 13 Mar 2007 | 14 Mar 2016 | England | October 1963 | High View The Green, Froggatt, Sheffield, S30 1ZA |
| BRODDLE, David RESIGNED | Director | 22 Aug 1994 | 13 Sep 2004 | England | October 1963 | High View The Green, Froggatt, Sheffield, S30 1ZA |
| LOB, Alexander Graham James RESIGNED | Director | | 10 Jan 2005 | | September 1954 | Green Eaves New Road, Prestbury, Macclesfield, Cheshire, SK10 4HP |
| LYNE, Barry Malcolm RESIGNED | Director | 01 Dec 1995 | 26 Apr 2006 | England | February 1957 | Westfields, High Street, Holme, NG23 7RZ |
| LYNE, Barry Malcolm RESIGNED | Director | | 28 Aug 1993 | | February 1957 | The Well House Kishfield Lane, Kettleshulme, Stockport, Cheshire, SK12 7RB |
| LYNE, Sally Louise RESIGNED | Director | | 28 Aug 1993 | | May 1961 | The Well House Kishfield Lane, Kettleshume, Stockport, Cheshire, SK12 7RB |
| MILLER, Andrew John RESIGNED | Director | 01 Apr 1999 | 02 Dec 1999 | | February 1965 | 14 Keswick Close, Gamston, Nottingham, NG2 6PF |
| NASH, Peter Charles RESIGNED | Director | 06 Apr 1992 | 05 Aug 1994 | | December 1955 | The Barn Badgemore Lane, Henley On Thames, Oxfordshire, RG9 2JH |
| OXLEY, Stephen Roger RESIGNED | Director | 14 Mar 2016 | 30 Apr 2019 | England | March 1973 | Solid Solutions Management Limited, Building 500, Abbey Park, Stareton, Kenilworth, Warwickshire, CV8 2LY, England |
| SAMPSON, Katharine Rachel RESIGNED | Director | 14 Mar 2016 | 24 Jun 2022 | United Kingdom | April 1962 | Solid Solutions Management Limited, Building 500, Abbey Park, Stareton, Kenilworth, Warwickshire, CV8 2LY, England |
| SINGLETON, Ian Michael RESIGNED | Director | 18 Dec 2003 | 14 Mar 2016 | England | April 1965 | Low Farm Cottage, 92-94 Netherton Lane Netherton, Wakefield, Yorkshire, WF4 4HG |
| SINGLETON, Ian Michael RESIGNED | Director | 01 Mar 1999 | 21 Mar 2001 | England | April 1965 | Low Farm Cottage, 92-94 Netherton Lane Netherton, Wakefield, Yorkshire, WF4 4HG |
| TURNER, Simon Charles RESIGNED | Director | 14 Mar 2016 | 06 Feb 2020 | United Kingdom | January 1969 | 5, The Rickyard, Easenhall, Rugby, Warwickshire, CV23 0JN, United Kingdom |