- MDL CONTROL SERVICES LIMITED- 01859604 - Incorporated on 30 October 1984 
- CENTRAL CONTROL SERVICES LIMITED- 02312758 - Incorporated on 3 November 1988 
- CHERRY CONTROL SERVICES LIMITEDDisolved- 02416571 - Dissolved on 11 April 2023 
- CONTROL ELECTRICAL SERVICES LIMITEDDisolved- 06941325 - Dissolved on 5 December 2023 
- CONTROL PANEL SERVICES LIMITED- 04820590 - Incorporated on 3 July 2003 
- POWER CONTROL SERVICES LIMITEDDissolved- 05553259 - Dissolved on 3 August 2010 
- ADVANCED CONTROL SERVICES LIMITED- 07221090 - Incorporated on 13 April 2010 
- SOLIDS CONTROL SERVICES LIMITED- SC384794 - Incorporated on 3 September 2010 
- CONTROL QUALITY SERVICES LIMITEDActive - Proposal to Strike off- 07501413 - Incorporated on 21 January 2011 
- CONTROL SECURITY SERVICES LIMITEDDissolved- 06214388 - Dissolved on 9 May 2017 
- PARKING CONTROL SERVICES LIMITEDActive - Proposal to Strike off- 06043819 - Incorporated on 8 January 2007 
- CONCEPT CONTROL SERVICES LIMITEDDissolved- 04181153 - Dissolved on 31 August 2010 
- RFA CONTROL SERVICES LIMITEDDissolved- 05575408 - Dissolved on 11 January 2011 
- AIR CONTROL SERVICES LIMITED- 13378029 - Incorporated on 5 May 2021 
- AI CONTROL SERVICES LIMITED- 15473164 - Incorporated on 7 February 2024 
- TEMPERATURE CONTROL SERVICES LIMITED- SC852522 - Incorporated on 17 June 2025 
- SAFE CONTROL SERVICES LIMITEDActive - Proposal to Strike off- 16078301 - Incorporated on 13 November 2024 
- INSTRUMENT & CONTROL SERVICES LIMITED- 01464404 - Incorporated on 3 December 1979 
- PRODUCTION CONTROL SERVICES LIMITEDDissolved- 04681153 - Dissolved on 8 June 2010 
- SOUTHERN CONTROL SERVICES LIMITED- 01609419 - Incorporated on 26 January 1982