The administrative counties of Cambridgeshire and Isle of Ely had been recombined in 1965 and Cambridgeshire was further expanded in 1974 to include Huntingdon and Peterborough under the Local Government Act 1972. Under the subsequent redistribution of seats, which did not come into effect until the 1983 general election, Cambridgeshire was abolished as a county constituency, forming the bulk of the new constituency of South East Cambridgeshire and the majority of South West Cambridgeshire.
