the Minister for the Civil Service have at times required the Prime Minister to discharge policy and be held accountable for it. For instance, it was occupying this role which saw the Prime Minister sued for her policies in Council of Civil Service Unions v Minister for the Civil Service. Other offices have historically been linked to the Prime Ministership but are no longer. Until Clement Attlee became Prime Minister, the vast majority of premiers had served as either Leader of the House of Commons or Leader of the House of Lords depending on the chamber in which they sat. As the power of the executive swelled, the need to have a legislative-oriented office receded. In 1942 during the Second World War Winston Churchill had made himself Minister of Defence, a title Prime Ministers would hold for thirteen years thereafter, but with the decline of defence as an urgent policy area this was abandoned by Sir Anthony Eden when he came to office in 1955. Boris Johnson held the position of Minister for the Union, which he created to display his commitment to strengthening the bond of the four nations of the United Kingdom. This role was retained by his successor Liz Truss. Accordingly, the First Lord of the Treasury is the title most associated with the Prime Ministership. Seven Prime Ministers saw fit to occupy the post of First Lord of the Treasury only, and held no other subsidiary office. Those Prime Ministers were Lord Rockingham (1782), Lord Portland (1807–1809), David Lloyd George (1916–1922), Sir Anthony Eden (1955–57), Harold Macmillan (1957–1963), Sir Alec Douglas-Home (1963–1964), and Harold Wilson (1964–1968, at which point he also became Minister for the Civil Service). See also List of Lords Commissioners of the Treasury since 1714 List of Lord Treasurers – includes a list of former Lords Commissioners of the Treasury until 1714 Secretary to the Treasury References 'Treasurers and Commissioners of the Treasury 1660—1870', Office-Holders in Modern Britain: Volume 1: Treasury Officials 1660–1870 (1972), pp. 16–25. Ceremonial officers in the United Kingdom Ministerial offices in the United Kingdom 1714 establishments in Great Britain