 The constituency was created for the 1918 general election, and abolished for the 1950 general election.The Urban Districts of Brandon and Byshottles, Crook, Spennymoor, Tow Law, and Wellington, in the Rural District of Auckland the parishes of Helmington Row, Hunwick and Helmington, and North Bedburn, the parish of Brancepeth in the Rural District of Durham, and the parish of Hedleyhope in the Rural District of Lanchester.General Election 1939/40