My Lords, including industrial processes, heating accounts for about 37% of total UK carbon emissions. Of the 17% of carbon emissions from heating and cooling in buildings, the vast majority can be attributed to domestic homes. Analysis shows that a third of the money pledged for retrofitting and alternative systems has not yet been allocated. That is approximately £2.1 billion unspent. When and how will this be resolved, or do the Government believe that they are on track to reduce emissions as planned without it?