| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CHESHIRE (SYSTEMS) LIMITED | 01008876 | 31/12/2010 | Dissolved |
| COUGAR AUTOMATION HOLDINGS LIMITED | 04229498 | 23/10/2017 | Dissolved |
| FINAL ASSEMBLY SYSTEMS LIMITED | 06340348 | 01/09/2010 | Dissolved |
| L B FORD LIMITED | 05243207 | 01/09/2010 | Dissolved |
| LEE BEESLEY INTERNATIONAL LIMITED | 00497715 | 21/06/2021 | Not Trading |
| MAIDENHEAD ELECTRICAL LIMITED | 06022373 | 31/12/2010 | Dissolved |
| MAIDENHEAD ELECTRICAL SERVICES LIMITED | 06022374 | 31/12/2010 | Dissolved |
| MAY & ROBERTSON LIMITED | 00710434 | 21/06/2021 | Dissolved |
| MESL GROUP LIMITED | 01680206 | 01/09/2010 | Dissolved |
| MESL LIMITED | 06084096 | 31/12/2010 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ACTEMIUM UK LIMITED | 00065493 | 01/09/2010 | 31/03/2022 | Silver |
| AND AUTOMATION LIMITED | 04446070 | 30/11/2015 | 31/03/2022 | Amber |
| AXIANS NETWORKS LIMITED | 04407184 | 23/01/2015 | 31/03/2022 | Bronze |
| COUGAR AUTOMATION LIMITED | 02397024 | 23/10/2017 | 31/03/2022 | One Red Flag |
| ELTEK SYSTEMS LIMITED | 01691497 | 16/11/2020 | 31/03/2022 | One Red Flag |
| FORD SYSTEMS LIMITED | 02904483 | 31/12/2010 | 08/04/2019 | Dissolved |
| HAROLD F.WARD LIMITED | 00266362 | 31/12/2010 | 08/04/2019 | Not Trading |
| KELVIN CONSTRUCTION COMPANY LIMITED | 07934819 | 02/02/2018 | 31/03/2022 | Gold |
| KELVIN ENERGY (UK) LIMITED | 03879529 | 02/02/2018 | 31/03/2022 | Insolvent |
| KELVIN POWER ENGINEERING LIMITED | 06515644 | 02/02/2018 | 31/03/2022 | Insolvent |
| KIGTEK ELECTRICAL LIMITED | SC463757 | 02/03/2022 | 31/03/2022 | Dissolved |
| KIGTEK SOLUTIONS LIMITED | SC349224 | 02/03/2022 | 31/03/2022 | Gold |
| LEE BEESLEY (COVENTRY) LIMITED | 00328569 | 31/12/2010 | 31/03/2022 | Not Trading |
| LEE BEESLEY DERITEND PENSION TRUSTEES LIMITED | 02511931 | 31/12/2010 | 17/11/2020 | Not Trading |
| LEE BEESLEY HOLDINGS LIMITED | 01234891 | 31/12/2010 | 31/03/2022 | Not Trading |
| LEE BEESLEY MECH & ELEC LIMITED | 00366836 | 31/12/2010 | 31/03/2022 | Dissolved |
| MELDRUM LIMITED | 04752009 | 19/04/2017 | 15/03/2022 | Bronze |
| NOUVEAU SOLUTIONS LIMITED | 02699382 | 26/03/2019 | 31/03/2022 | One Red Flag |
| OMEXOM UK LIMITED | 00376835 | 31/12/2010 | 08/04/2019 | Not Trading |
| POWELL ENGINEERING UK LIMITED | 03854782 | 30/11/2016 | 31/03/2022 | Bronze |
| POWERTEAM ELECTRICAL SERVICES (UK) LIMITED | NI034635 | 24/12/2013 | 31/03/2022 | One Red Flag |
| QSI GROUP LTD | 03698142 | 31/07/2017 | 31/03/2022 | Silver |
| TWYVER LIMITED | 01559207 | 31/12/2010 | 08/04/2019 | Dissolved |
| TWYVER SWITCHGEAR LIMITED | 00937921 | 31/12/2010 | 08/04/2019 | Dissolved |
| VINCI ENERGIES UK HOLDING LIMITED | 08804424 | 06/12/2013 | 31/03/2022 | Silver |
| VINCI UK FOUNDATION | 09639905 | 15/06/2015 | 31/03/2022 | Gold |
| W.H. TAYLOR (DERBY) LIMITED | 00497774 | 31/12/2010 | 31/03/2022 | Not Trading |