 Complete the following phrase:  Varley was appointed Secretary of State for Energy in March 1974 when Labour returned to power. The appointment of an NUM-sponsored MP helped the government end the NUM strike which had led the previous government to ration electricity to three days a week. Varley subsidised the National Coal Board and chose a British design for new nuclear power stations over an American rival. He also began the procedure to nationalise North Sea oil. During the 