Great Offices of State have come close to achieving this distinction: Herbert Henry Asquith and Winston Churchill both served as Chancellor, Prime Minister and Home Secretary while Harold Macmillan and John Major served as Prime Minister, Chancellor and Foreign Secretary. Rab Butler and Sir John Simon served as Chancellor of the Exchequer, Foreign Secretary and Home Secretary. Two of the Great Offices of State have often been held simultaneously by one person, most recently by Ramsay MacDonald, Prime Minister and Foreign Secretary in 1924; Arthur Wellesley, the Duke of Wellington, is the only person to have held three of the Great Offices simultaneously, serving
Prime Minister of the United Kingdom of the Privy Council and thus entitled to the appellation "The Right Honourable". Membership of the Council is retained for life. It is a constitutional convention that only a Privy Counsellor can be appointed Prime Minister. Most potential candidates have already attained this status. The only case when a non-Privy Counsellor was the natural appointment was Ramsay MacDonald in 1924. The issue was resolved by appointing him to the Council immediately prior to his appointment as Prime Minister. According to the now defunct Department for Constitutional Affairs, the Prime Minister is made a Privy Counsellor as a result of taking