| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Caird Environmental (Northern) Ltd | 01290041 | 30/09/1991 | Dissolved |
| Caird Treatment Centre (Liverpool) Limited | 02343478 | 31/12/1991 | Dissolved |
| Catwick Landfill Ltd | 01963103 | 31/10/1989 | Dissolved |
| Marishal Thompson Group Ltd | 05384769 | 29/09/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Birchinley Waste Management Limited | 02261164 | 31/12/1991 | 24/03/1993 | Dissolved |
| Blackstock Properties Limited | 02247680 | 31/12/1991 | 24/03/1993 | Dissolved |
| Brown Brothers (Construction) Ltd | 01253720 | 31/12/1990 | 24/03/1993 | Dissolved |
| CAIRD EVERED LIMITED | 02292344 | 27/02/1994 | 27/02/1995 | Bronze |
| CAIRD GROUP LIMITED | SC010344 | 11/09/1990 | 01/03/1993 | Dissolved |
| CAIRD PECKFIELD LIMITED | 02433065 | 27/02/1993 | 30/04/1993 | Bronze |
| Caird Enviromental (North West) Ltd | 01400349 | 31/12/1991 | 24/03/1993 | Dissolved |
| Caird Environmental (East) Ltd | 02019753 | 31/12/1991 | 24/03/1993 | Dissolved |
| Caird Environmental (North East) Ltd | 01363107 | 31/12/1990 | 24/03/1993 | Dissolved |
| Caird Environmental (Scotland) Ltd | SC115024 | 14/12/1988 | 24/03/1993 | Dissolved |
| Caird Industrial Heating Limited | 02343441 | 31/12/1991 | 24/03/1993 | Dissolved |
| Caird Industrial Services (North West) Ltd | 01813688 | 31/12/1991 | 24/03/1993 | Dissolved |
| Caird Industrial Services (South) Ltd | 00953931 | 31/12/1990 | 26/03/1991 | Dissolved |
| Caird Process Engineers Limited | 02451301 | 31/12/1990 | 24/03/1993 | Dissolved |
| Caird Special Waste Ltd | 01972934 | 31/12/1991 | 24/03/1993 | Dissolved |
| Caird Treatment Centres Ltd | 01674006 | 31/12/1990 | 24/03/1993 | Dissolved |
| Chemical & Environmental Technologies Ltd | 02077677 | 31/12/1991 | 24/03/1993 | Dissolved |
| Chester & Clwyd Waste Reception Centre Limited | 01980902 | 31/12/1991 | 24/03/1993 | Dissolved |
| Cleveland Automation International Ltd | 01371036 | 31/12/1991 | 24/03/1993 | Dissolved |
| Cleveland Fuels Ltd | 02103080 | 17/01/1989 | 24/03/1993 | Dissolved |
| Dancing Brave Ltd | 02444367 | 20/11/1991 | 24/03/1993 | Dissolved |
| ENVIROMAN UNLIMITED | 02194523 | 31/12/1990 | 26/03/1991 | Dissolved |
| Hazchem Technical Services Ltd | 01802997 | 31/12/1991 | 24/03/1993 | Dissolved |
| Hirt Combustion Engineers Ltd | 01560895 | 15/05/1992 | 24/03/1993 | Dissolved |
| IMCO RECONOMY 5 LIMITED | 03347372 | 08/02/2002 | 01/11/2004 | Dissolved |
| IMCO RECONOMY 6 LIMITED | 02303868 | 26/02/1999 | 01/11/2004 | Dissolved |
| IMCO RECONOMY 7 LIMITED | 03441128 | 03/12/1997 | 01/11/2004 | Dissolved |
| K & M Davies (Metals) Ltd | 02136985 | 31/12/1990 | 13/03/1991 | Dissolved |
| Key Quarries Ltd | 00828636 | 31/12/1990 | 24/03/1993 | Dissolved |
| Kinnis & Brown (Chemical Services) Ltd | 00622089 | 31/12/1990 | 24/03/1993 | Dissolved |
| Kinnis & Brown (Technical Services) Ltd | 00919018 | 31/12/1990 | 24/03/1993 | Dissolved |
| Nimmo Equipment Services Ltd | SC071222 | 21/11/1988 | 24/03/1993 | Dissolved |
| P & H Environmental Services Ltd | 01355389 | 31/12/1991 | 24/03/1993 | Dissolved |
| PORT PAINTERS LIMITED | 01036437 | 31/12/1991 | 03/01/1991 | Dissolved |
| Solvex Environmental Services Ltd | SC102142 | 11/07/1991 | 24/03/1993 | Dissolved |
| Taylor Sheppard Engineering Ltd | 01902117 | 31/12/1990 | 26/03/1991 | Dissolved |
| Technosafe Cleaning & Disposal Ltd | 01784909 | 31/12/1991 | 24/03/1993 | Dissolved |
| WILLIAM ROBERTS (HAULAGE) LIMITED | 00702778 | 03/12/1997 | 01/11/2004 | Dissolved |
| WRG ENVIRONMENTAL LIMITED | 02206141 | 31/12/1991 | 24/03/1993 | One Red Flag |