Clitheroe is a town and civil parish in the borough of Ribble Valley, Lancashire, England. It lies on the southern edge of the Forest of Bowland and is often used as a base for tourists in the area. The most notable building in the town is a Norman keep, quarreled as one of the smallest in the country. The town elected two members to the Unreformed House of Commons. The Great Reform Act reduced this to one. It was one of the boroughs reformed by the Municipal Corporations Act 1835, and remained a municipal borough until the Local Government Act 1972 came into force in 1974 when it became a successor parish within the Ribble Valley district. The place has been claimed to be the most (geographically) central town in Britain, by virtue of its proximity to the village of Dunsop Bridge.