ベルパー (議会選挙区)
In 1950, boundary changes removed the Urban Districts of Alfreton and Heage to the Ilkeston constituency, together with the civil parish of Shipley from out of Belper Rural District. To compensate for this loss of electors, the changes transferred in the rest of the Repton Rural District from the West Derbyshire and South East Derbyshire constituencies. In addition from South East Derbyshire came the Urban District of Swadlincote.