| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| GAS TURBINE CONTROLS LIMITED | 05396810 | 29/10/2009 | Dissolved |
| SSI 7 LIMITED | 07615064 | 27/04/2011 | Dissolved |
| SSTS ENERGY LTD | 15008156 | 17/07/2023 | Bronze |
| TC POWER (ENGLAND) LIMITED | 08152657 | 23/07/2012 | Dissolved |
| TC POWER HYDRAULICS LIMITED | 05530729 | 08/08/2005 | Dissolved |
| TC POWER LIMITED | 04182459 | 30/03/2001 | Dissolved |
| TSL INTERNATIONAL LIMITED | 11140771 | 09/01/2018 | Dissolved |
| Tc Power (Share Trustees) Ltd | 05077846 | 18/03/2004 | Dissolved |
| Tc Power (Share Trustees) Ltd | 05077846 | 18/03/2004 | Dissolved |
| Tc Power Ltd | 03838505 | 09/09/1999 | Dissolved |
| Westsonic Ltd | 03396514 | 01/12/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| GAS TURBINE CONTROLS LIMITED | 05396810 | 21/03/2005 | 31/01/2006 | Dissolved |
| S & H BARTON PROPERTY LIMITED | 05479227 | 13/06/2005 | 16/04/2013 | Bronze |
| S & S TECHNICAL SERVICES LIMITED | 10176835 | 12/05/2016 | 17/01/2020 | Dissolved |
| TURBINE SPECIALISTS LIMITED | 08201258 | 04/09/2012 | 27/10/2012 | Dissolved |