| HITCHEN, Darryl Lee ACTIVE | Secretary | 01 Jan 2024 | | | | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| CARPENTER, Gráinne, Dr ACTIVE | Director | 01 Aug 2021 | | England | July 1971 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| CAULFIELD, Andrew James ACTIVE | Director | 01 Jul 2024 | | England | April 1980 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| MEFFAN, Norman Ian ACTIVE | Director | 28 Nov 2003 | | United Kingdom | February 1928 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| MELLING, Oliver Joseph ACTIVE | Director | 01 Apr 2025 | | England | September 1982 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| SEARLE, John Joseph ACTIVE | Director | 01 Jan 2025 | | England | October 1960 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| WILCOX, Joseph Mark ACTIVE | Director | 01 Apr 2026 | | England | May 1981 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| WILSON, Gareth John ACTIVE | Director | 01 Sep 2022 | | England | May 1983 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| ENTWISTLE, Howard RESIGNED | Secretary | 01 Feb 2006 | 01 Jan 2024 | | | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| LANIGAN, Philip Nicholas RESIGNED | Secretary | 01 Jun 1999 | 31 Oct 1999 | | | 120 Buckingham Road, Stockport, Cheshire, SK4 4RG |
| NICHOLSON, Christopher William RESIGNED | Secretary | 01 Nov 1999 | 01 Feb 2006 | | | Fir Trees, Bilsborrow Lane Bilsborrow, Preston, Lancashire, PR3 0RP |
| NICHOLSON, Christopher William RESIGNED | Secretary | 08 Feb 1993 | 01 Jun 1999 | | | Fir Trees, Bilsborrow Lane Bilsborrow, Preston, Lancashire, PR3 0RP |
| THOMSON, Malcolm Lawrence RESIGNED | Secretary | 15 Dec 1992 | 08 Feb 1993 | | | 65 Blackburn Road, Rishton, Blackburn, Lancashire, BB1 4EU |
| CHETTLEBURGH INTERNATIONAL LIMITED RESIGNED | Nominee Secretary | 30 Nov 1992 | 15 Dec 1992 | | | Temple House, 20 Holywell Row, London, EC2A 4JB |
| BRANTON, Kenneth William RESIGNED | Director | 05 Nov 1999 | 31 Jan 2006 | England | October 1958 | 10 Harebell Close, Formby, Merseyside, L37 4JP |
| BRANTON, Kenneth William RESIGNED | Director | 01 Oct 1993 | 28 Mar 1995 | England | October 1958 | 10 Harebell Close, Formby, Merseyside, L37 4JP |
| COLES, Mark Raymond RESIGNED | Director | 01 Apr 2014 | 10 Apr 2025 | England | February 1965 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| DEALL, Andrew John RESIGNED | Director | 01 Apr 2014 | 31 Mar 2026 | England | July 1972 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| ENTWISTLE, Howard RESIGNED | Director | 13 Jun 2006 | 02 Dec 2024 | England | July 1956 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| FERGUSON, Martin Liam RESIGNED | Director | 01 Apr 1995 | 28 Oct 1999 | United Kingdom | February 1954 | Saundersfoot House Chapeltown Road, Bromley Cross, Bolton, Lancashire, BL7 9AT |
| FERGUSON, Martin Liam RESIGNED | Director | 08 Feb 1993 | 01 Oct 1993 | United Kingdom | February 1954 | Saundersfoot House Chapeltown Road, Bromley Cross, Bolton, Lancashire, BL7 9AT |
| MORRIS, John RESIGNED | Director | 01 Oct 1999 | 30 Jun 2020 | United Kingdom | May 1952 | Nis Limited, Ackhurst Road, Chorley, Lancashire, PR7 1NH |
| NICHOLSON, Christopher William RESIGNED | Director | 01 Feb 2006 | 04 Jul 2015 | United Kingdom | May 1955 | Fir Trees, Bilsborrow Lane Bilsborrow, Preston, Lancashire, PR3 0RP |
| PENROSE, Richard RESIGNED | Director | 15 Dec 1992 | 31 May 2017 | England | May 1961 | Nis Limited, Ackhurst Road, Chorley, Lancashire, PR7 1NH |
| PORTER, James Stephen RESIGNED | Director | 13 Jun 2006 | 31 Dec 2025 | England | May 1965 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| ROBSON, Philip John RESIGNED | Director | 01 Oct 1993 | 03 Jan 2007 | England | August 1950 | 15 Coudray Road, Southport, Merseyside, PR9 9NL |
| ROGERS, Graham RESIGNED | Director | 13 Jun 2006 | 31 Jan 2015 | United Kingdom | September 1953 | 11 The Coppice, Ewloe, Clwyd, CH5 3RS |
| THOMSON, Malcolm Lawrence RESIGNED | Director | 15 Dec 1992 | 31 Mar 2001 | | April 1952 | 65 Blackburn Road, Rishton, Blackburn, Lancashire, BB1 4EU |
| WISE, Michelle RESIGNED | Director | 02 Apr 2012 | 02 Aug 2021 | England | July 1966 | Nsg Environmental Limited, Ackhurst Road, Chorley, PR7 1NH, England |
| CHETTLEBURGH'S LIMITED RESIGNED | Nominee Director | 30 Nov 1992 | 15 Dec 1992 | | | Temple House, 20 Holywell Row, London, EC2A 4JB |