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) three posts were split from the single holder. The last person to hold all three positions together was Gus O'Donnell, Cabinet Secretary, Head of the Home Civil Service and Cabinet Office Permanent Secretary, September 2005 – January 2012. The postholder is responsible for ensuring that the Civil Service is equipped with the skills and capability to meet the everyday challenges it faces and that civil servants work in a fair and decent environment. They also chair the Permanent Secretary Management Group and the Civil Service Steering Board which are the main governing bodies of the Civil Service. It was announced