It returned one member to the House of Commons of the UK Parliament 1918 – 1974.

Before 1945 the seats electorate had not elected any Labour candidate, however had sided overall with the Liberal candidate once, in 1923, in a by-election.

1918–1950: The Urban District of Willesden wards of Brondesbury Park, Cricklewood, Kensal Rise, Mid Kilburn, North Kilburn, and South Kilburn.

1950–1974: The Municipal Borough of Willesden wards of Brondesbury Park, Carlton, Cricklewood, Kilburn, Mapesbury, and Neasden.

The political parties had been making preparations for an election to take place from 1939 and by the end of this year, the following candidates had been selected;