Six subsidiaries of main contractor ISG have filed notices to enter administration.
The firms that filed notices late on Thursday afternoon are: ISG Construction Limited, ISG Engineering Services Limited, ISG Retail Limited, ISG UK Retail Limited, ISG Jackson Limited and ISG Central Services Limited.
Court applications went in as chaos descended on many sites as rumours spread across the industry that ISG’s financial problems had come to ahead.
Subcontractors were reported to be downing tools on several sites amid worries they would not get paid.
It is not yet confirmed which administrators will be appointed to the £2.2bn turnover business, which employs around 3,000 staff, although rumours have been circulating that Ernst & Young could be called in.
The application to appoint administrators comes just days before staff were due to receive monthly salaries on Monday.
