Principal Private Secretary to the Prime Minister appointed by Theresa May on 10 May 2017. During Tony Blair's administration, he modified the law under which the Civil Service operated to create the role of Downing Street Chief of Staff, which though held by a political advisor outranked the Principal Private Secretary. When Gordon Brown ascended to office, he reversed the change to the Civil Service law. When David Cameron became Prime Minister, he promoted the then-PPS to a new post of "Permanent Secretary, Downing Street", a position which took over heading the Prime Minister's Office. In 2012, the postholder, Jeremy Heywood, was appointed as Cabinet Secretary, this
Civil Service (United Kingdom) and instructions to departments and agencies regarding the terms and conditions of service of civil servants. It is the guiding document which gives delegation to civil service organisations, from the Minister for the Civil Service, in order for them to make internal personnel policies. The Civil Service Commissioners' Recruitment Code is maintained by the Civil Service Commissioners and is based on the "principle of selection on merit on the basis of fair and open competition." The Osmotherly Rules set out guidance on how civil servants should respond to Parliamentary select committees. A two-volume 125-page "Directory of Civil Service Guidance" was