This resulted in territory loss to newly formed seats in 1918 and 1950 and further population growth (coupled with a programme of new housing principally under the New Towns Act 1946) justified abolition and division into East and West seats in 1974.
In the election landslide of 1945, the seat was won by the Labour Party, but recaptured at the next election by Charles Hill who served as a National Liberal, in coalition with the Conservatives, from 1950 until 1963, when he was made a life peer (Baron Hill of Luton).
The resulting by-election was won by Labour which held it until 1970 when it was taken by the Conservative Party until the seat was abolished for the February 1974 general election.
The Leagrave and Limbury wards, together with the Borough of Dunstable and surrounding rural areas were included in the new constituency of South Bedfordshire.
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;