 The constituency was created by the House of Commons (Redistribution of Seats) Act 1949 for the 1950 general election, and abolished for the 1983 general election.From the 1983 election onwards, the areas covered by Preston South were moved to Preston and South Ribble.The County Borough of Preston wards of Ashton, Avenham, Christ Church, Maudland, St John's, St Peter's, and Trinity, and the Urban District of Walton-le-Dale.