 In 1933 Cleworth Hall mined the Trencherbone, Haigh Yard, Cannel, Three Feet, Four Feet and Arley coal seams and employed over 900 workers.The company remained independent until it became part of the National Coal Board's (NCB) North Western Division on nationalisation in January 1947 when 760 men were employed underground and 258 on the surface.In 1961 the area became the NCB's East Lancashire Area.