Three of the Big Six energy companies, Marks & Spencer and Tesco are missing from the initial list of companies offering home insulation under the Green Deal scheme.
The list of companies that will be providing home improvement services, published on Wednesday, was expected to include leading supermarkets such as Tesco, Asda and Sainsbury's. The Green Deal Scheme is designed to increase energy efficiency in draughty British homes, nearly half of which do not have loft or cavity wall insulation.
Of the energy companies, British Gas, E.ON and Scottish and Southern Electric are confirmed as providers, and B&Q is the only high street retailer. The list of 22 initial Green Deal providers is dominated by small- and medium-sized energy companies such as Toriga Energy and Yorkshire Energy Services.
A spokesperson for the Department of Energy and Climate Change said more companies would sign up to offer the green deal: "This is just the first tranche of green deal providers. We expect there to be many more companies signing up. We want people to come forward as soon as they feel they are able." She added that there would be no limit to the number of providers.