The second periodic review of Westminster constituencies was undertaken between 1965 and 1969 by the four boundary commissions for England, Scotland, Wales and Northern Ireland for the United Kingdom Parliament as provided by the House of Commons (Redistribution of Seats) Act 1949 and amended by House of Commons (Redistribution of Seats) Act 1958.
[1] The changes to the constituencies were approved in 1970 and took effect at the February 1974 United Kingdom general election.
4084-4087[2]), the Labour Government did not put them forward for approval before calling an election which was held in June 1970.
[7] There had also been significant reorganisations of local authorities in the Black Country and Teesside resulting in major changes to boundaries in these areas.
Outside the large cities, the bulk the constituencies in Lancashire and the West Riding of Yorkshire were unchanged.
The commissions had carried out interim reviews in 1956, 1960 and 1964 under the provisions of the House of Commons (Redistribution of Seats) Act 1949 to bring boundaries into line with those of local authorities.
Also referred to Boundary Maps on the Vision of Britain Through Time website.