I thank the hon. Gentleman for giving way, and ask him to consider the following fact. The properties built in 1977, 1978 and 1979 were built not on land which was bought between 1977 and 1979, but on land bought by builders up to five years ahead of their building programme. Therefore, his statistics are of little relevance. The hon. Gentleman referred to the welcome increase in starts in 1983. The houses were built on land which was subject to a lower rate of development land tax—it had fallen from 80 per cent. to 60 per cent.—which was introduced by my right hon. and learned Friend the then Chancellor of the Exchequer in his Budget of 1980—not 1979 as the hon. Member for Kingston upon Hull, West (Mr. Randall) said earlier.