- PSL CONSTRUCTION LIMITED- 08016811 - Incorporated on 3 April 2012 
- PSL (MONTROSE) LIMITEDDisolved- SC317439 - Dissolved on 20 May 2025 
- PSL PAYROLL LIMITEDLiquidation- 09085142 - Incorporated on 13 June 2014 
- CONTRACTOR PSL LIMITEDActive - Proposal to Strike off- 08928830 - Incorporated on 7 March 2014 
- PSL FLOORING LIMITED- SC615706 - Incorporated on 7 December 2018 
- PSL CARPENTRY LIMITED- 09641856 - Incorporated on 16 June 2015 
- PSL BRIGHTON LIMITED- 15627010 - Incorporated on 8 April 2024 
- PSL (LIVERPOOL) LIMITED- 04164327 - Incorporated on 20 February 2001 
- PSL SERVICES LIMITED- SC701926 - Incorporated on 17 June 2021 
- PSL DEVELOPMENT LIMITED- 07079399 - Incorporated on 18 November 2009 
- PSL SERVICES LIMITED- 05237291 - Incorporated on 21 September 2004 
- PSL AUTOMATION LIMITED- 03276462 - Incorporated on 11 November 1996 
- PSL RESEARCH LIMITEDDisolved- 08027321 - Dissolved on 14 March 2022 
- PSL INVENTORIES LIMITED- 07583880 - Incorporated on 30 March 2011 
- PSL MANAGEMENT LIMITEDDisolved- 07890034 - Dissolved on 30 May 2023 
- PSL SHOPFITTING LIMITED- 08275685 - Incorporated on 31 October 2012 
- PSL ASSEMBLIES LIMITED- 06509008 - Incorporated on 19 February 2008 
- PSL MANUFACTURING LIMITEDActive - Proposal to Strike off- 06762945 - Incorporated on 2 December 2008 
- PSL NETWORKS LIMITEDActive - Proposal to Strike off- 08390339 - Incorporated on 5 February 2013 
- PSL SCAFFOLDING LIMITEDActive - Proposal to Strike off- 12252605 - Incorporated on 9 October 2019