Energy and Climate Change Minister Greg Barker said: “I welcome this report from the OFT, which highlights a number of important issues with the home insulation market. It shows that people are not always being well served by the current setup. That is why consumers are at the very heart of the Green Deal, which will enable people to save energy and money.

“I am pleased that the OFT recognises the efforts we are putting into the Green Deal to ensure it delivers the best deal for consumers, and I look forward to working with them to see how we can make it even better.”

The range of consumer protections embedded in the Green Deal include:

• A new Green Deal quality mark to protect customers from rogue traders. Any Green Deal installer, provider or adviser will have to display this seal of approval to demonstrate they comply with the required standards
• A new Green Deal Oversight Body, which will carry out spot checks on Green Deal participants, like site visits or mystery shopping, to ensure compliance to the right standards. It will have the power to recommend if a company should be stripped of its Green Deal seal of approval
• A clear complaints procedure if anything goes wrong
• Green Deal plans for householders will be limited to fixed interest rate deals only. This will ensure simplicity and allow customers to compare offers
• Clear information so customers know what they are signing up to, including two initial energy assessments, warranties and all permissions to be sought in writing before work is undertaken.