Is the hon. Gentleman aware that while the cost of building an average four-apartment house in Scotland has increased by only £864—according to the figures given in answer to me by his right hon. Friend last week—a considerable increase of about £4,800 in interest charges arises as a direct result of Government economic policy, and not increased wages for building workers, as his right hon. Friend said last week? Will he, therefore, give an assurance that the Government will see that interest rates are reduced, or that housing subsidies are increased, instead of continually calling on local authorities to ask tenants to pay higher rates in order to meet these interest charges?