 In 1960 the Chancellor of the Exchequer , Derick Heathcoat @-@ Amory , insisted on retiring . Macmillan agreed with Heathcoat @-@ Amory that the best successor at the Treasury would be the current Foreign Secretary , Selwyn Lloyd . In terms of ability and experience the obvious candidate to take over from Lloyd at the Foreign Office was Home , but by 1960 there was an expectation that the Foreign Secretary would be a member of the House of Commons . The post had not been held by a peer since Lord Halifax in 1938 – 40 ; Eden had wished to appoint Salisbury in 1955 , but concluded that it would be unacceptable to the Commons . 
