| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ACORN MECHANICAL SERVICES LIMITED | 06619503 | 21/08/2019 | Dissolved |
| ACORN PRESSURISATION SERVICES LIMITED | 02209904 | 01/04/1994 | Dissolved |
| AGM PUMP SERVICES LIMITED | 03858871 | 21/08/2019 | Dissolved |
| APALER LLP | OC436133 | 18/03/2021 | Dissolved |
| AQUATECH PRESSMAIN LIMITED | 01677940 | 01/10/2009 | Dissolved |
| ARE2 LIMITED | 02603379 | 24/03/2016 | Dissolved |
| MAINPLACE LIMITED | 02668366 | 31/10/2018 | Dissolved |
| NORTUA LIMITED | 00983440 | 01/10/2009 | Dissolved |
| O.S. LOCKE LIMITED | 03980147 | 01/10/2008 | Dissolved |
| PGL2 LIMITED | 04979847 | 20/04/2010 | Dissolved |
| POWER GATES LIMITED | 08203028 | 21/08/2019 | Dissolved |
| PRESSMAIN PRESSURISATION COMPANY LIMITED | 06619463 | 21/08/2019 | Dissolved |
| PSI INSPECTION SERVICES LIMITED | 02662845 | 24/11/2015 | Dissolved |
| RENZLAND POWERGATES LIMITED | 03742817 | 12/09/2000 | Dissolved |
| TAYLOR PROPERTIES (WIVENHOE) LIMITED | 01671120 | 01/10/2012 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AGM FACILITIES LIMITED | 01372991 | 31/08/2006 | 29/07/2022 | Silver |
| AQUATRONIC GROUP MANAGEMENT LIMITED | 03426729 | 31/03/2003 | 29/07/2022 | Silver |
| ENGINEERING SAFETY INSPECTION SERVICES LIMITED | 03340216 | 03/09/2001 | 29/07/2022 | Amber |