The move follows a four week shutdown at the firm’s 12 UK sites.

Vivalda said it is keen to get on with vital refurbishment work of unsafe cladding on tall buildings.

Managing director Ben Jayes said: “We’re obviously as keen as anyone to get back to work, but only when we can guarantee our people’s safety.

“Having seen the leadership shown by contractors such as Taylor Wimpey and housebuilders Persimmon, both of whom have introduced stringent Covid-19 policies and site procedures, we’re delighted to be supplying non-flammable cladding once again.

“For ourselves, we’ve sourced all the right PPE for staff at each site and undertaken compulsory training to ensure every branch operates to the Construction Leadership Council’s standard operating procedures.

“We’ve also considered transport options to work and have introduced flexible working so that those who need to take public transport can avoid rush hours and crowded tubes, trains and buses.

“We’ve been frankly surprised by the very encouraging levels of new enquiries coming across our desks in the last four weeks.

“While in April 2019 we identified 79 qualified enquiries, in the same period this year, we’ve had over 70 – and that’s a few days before the end of the month.

“Given the fact that so few sites were open, we think a lot of developers have tasked their teams to focus on projects which would have otherwise taken months to gain approval.”