Welfare Reform Bill

I wonder whether the Minister can help me just a fraction. I note from a Written Answer in another place on 15 May last year, at col. 637W of Hansard, that the number of housing benefit recipients assessed under the single room rent scheme in Great Britain has been dropping quite staggeringly over recent years. I accept that in the past three or four years the figure has levelled off at between 10,500 and 12,000; none the less, can the Minister give any reason for that, and can he say whether the figure of £10 million, which the noble Earl produced, is the department’s understanding of what the amendment would cost?