NWS is the latest in a growing line of companies in the green subsidy sector reaching crisis point.
During the summer, 600 jobs went at Domestic and General Insulation, which ceased all activity in this area, while the Leicester-based Mark Group - previously one of Britain’s largest installers - announced nearly 700 people were facing redundancy.
In Swansea, the high profile Nationwide Energy Services company - featured as part of the BBC documentary series The Call Centre - has entered receivership. Meanwhile, Sheffield-based SIG, sold off its loss-making installation subsidiary Miller Pattison to HelpLink of Hull.
Earlier this year Carillion, a FTSE100 company, reported it had lost £43m and cut 1,000 jobs from its energy services division, due in part to far lower than expected demand for energy efficiency upgrades.
Meanwhile, the Green Deal Financing Company, which provides loans for the troubled Green Deal energy insulation programme, is understood to be seeking an immediate multi-million pound Government bailout to avoid liquidation. It is in trouble because it has not been able to convince its primary lender, the state-owned Green Investment Bank, to provide more funding after its £244 million deal expires this year.