The only Prime Minister of the 20th century to have previously held all three of the other Great Offices of State (Foreign Secretary, Home Secretary and [[Chancellor of the Exchequer]]), he became [[Labour Party]] leader and PM following [[Harold Wilson]]'s unexpected resignation. | The only Prime Minister of the 20th century to have previously held all three of the other Great Offices of State (Foreign Secretary, Home Secretary and [[Chancellor of the Exchequer]]), he became [[Labour Party]] leader and PM following [[Harold Wilson]]'s unexpected resignation. |