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Planning and Energy Bill

My hon. Friend refers principally to thermal insulation, but he is on to something quite important with regard to sound attenuation. On the point about the amount of development in inner-London constituencies, in my area, even where there are cellars—or Kasey Kellers as people call them locally—people have tried to build there. Given his discussions with the Thermal Insulation Manufacturers and Suppliers Association, was he aware of any part of its remit that includes the benign combination of thermal and sound insulation in the same material?