A statement of affairs posted at Companies House reveals the firm had debts of £4m when it went under.

Money owed included £640,000 in unpaid bills across more than 90 firms in the supply chain.

CBS had been in business since 2012 offering a fully integrated mechanical and electrical engineering and contracting service.

Recently completed projects included a £1.3m MEP package for Consortia on an apartment complex in Birmingham and a £4.5m job for Elliott Group on a large residential job in Worcester.