asked the Secretary of State for Social Services what is the number of self-employed persons in the How-den constituency as revealed by the 1971 Census, and also the percentage of self-employed persons in the population of that constituency.

According to a 10 per cent. sample from the 1971 Census the number of self-employed persons in the Howden constituency was 4,890, which represents 15·7 per cent of the population in employment aged 15 and over.