| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Central Heating Information Council Ltd | 03946402 | 03/05/2000 | Dissolved |
| PLUMBING PROMOTIONS LIMITED | 02174878 | 01/06/2000 | Dissolved |
| UTC WORCESTERSHIRE LIMITED | 09973445 | 27/01/2016 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BOSCH THERMOTECHNOLOGY LTD | 01993294 | 07/06/1993 | 30/06/2015 | Silver |
| BOULTER BUDERUS LIMITED | 03786883 | 11/11/2003 | 15/08/2012 | Dissolved |
| CONSTRUCTION PRODUCTS ASSOCIATION | 03861752 | 28/04/2009 | 13/09/2012 | Gold |
| Grate Glow Fires Ltd | 01210900 | 23/02/1994 | 01/05/1995 | Dissolved |
| OFTEC LIMITED | 02739706 | 09/05/1996 | 03/04/1997 | One Red Flag |
| PLUMBING & HEATING PROMOTIONS LIMITED | 09814067 | 01/02/2016 | 29/07/2022 | Gold |
| THE INSTITUTE OF PLUMBING AND HEATING ENGINEERING | 00092374 | 11/07/1991 | 02/06/2000 | Dissolved |
| TRIANCO LIMITED | 00957021 | 23/09/1992 | 31/05/1993 | One Red Flag |
| WORCESTER GROUP LIMITED | 00735487 | 01/07/2014 | 30/06/2015 | Insolvent |
| WORCESTER GROUP PROPERTIES LIMITED | 02616689 | 30/04/2001 | 15/08/2012 | Dissolved |
| WORCESTER HEAT SYSTEMS LIMITED | 05213115 | 22/11/2004 | 15/08/2012 | Dissolved |