Parliamentary constituencies were redrawn under the Representation of the People Act 1918, with boundaries in London realigned to those of the metropolitan boroughs. Accordingly, the Hampstead constituency was defined by the legislation as being identical in area to the metropolitan borough of the same name.[4][5] When the next redistribution was carried out under the Representation of the People Act 1948, the term "parliamentary borough" was replaced with "borough constituency". The renamed Hampstead Borough Constituency continued with the same boundaries, with the changes coming into effect for the 1950 general election.[6]
In 1965 both the County of London and the metropolitan boroughs were abolished. Hampstead became part of the larger London Borough of Camden.[4] The changes were not reflected in parliamentary boundaries until 1970. The constituency was officially renamed "Camden, Hampstead Borough Constituency" and was defined as comprising seven wards of the London Borough, namely Adelaide, Belsize, Hampstead Town, Kilburn, Priory, Swiss Cottage and West End.[7] The wards of the borough were altered in 1973, with Swiss Cottage ward replacing Hampstead Central in the constituency's definition.[4] These boundaries were used until 1983, when the seat was abolished.
^"Chap. 23. Redistribution of Seats Act, 1885". The Public General Acts of the United Kingdom passed in the forty-eighth and forty-ninth years of the reign of Queen Victoria. London: Eyre and Spottiswoode. 1885. pp. 111–198.
^Redistribution of Seats Act 1885. Fourth Schedule: New Boroughs
^ abcdeYoungs, Frederic A Jr. (1979). Guide to the Local Administrative Units of England, Vol.I: Southern England. London: Royal Historical Society. pp. 305, 742–745. ISBN0901050679.
^Representation of the People Act 1918. Ninth Schedule: Redistribution of Seats
^Representation of the People Act 1948, First Schedule: Parliamentary Constituencies