 Twentieth century construction included a branch from Leek to Cauldon Lowe via Waterhouses from where the 2 ft 6 in ( 762 mm ) narrow gauge Leek and Manifold Valley Light Railway ( L & MV ) was constructed through the Hamps and Manifold river valleys to Hulme End near Hartington . Although the L & MV was nominally independent the NSR both worked and operated the line . 
