To collect employment, household and voting data for 85 British Towns. Variables Population in 1966, population growth 1961 - 1966. Per cent of total economically active and retired men in social classes 1, 2, 3, 4 and 5. Per cent of total economically active and retired men who were in various different types of employment. Per cent of total labour force in manufacturing, transport and services. Per cent of workers commuting in and per cent of residents commuting out. Number of households with more than 2 cars, number of households rented from council/with amenities/overcrowded. Amount of local authority/private building in 1966. Per cent of constituency population who were Irish, young voters, old voters, working women, unemployed, who had migrated during the last 5 years.