First Lord of the Treasury that office; in this case, the Second Lord of the Treasury usually served as Chancellor. As of 1841, the Chancellor of the Exchequer has always been Second Lord of the Treasury when he was not also Prime Minister. By convention, the other Lords Commissioners of the Treasury are also Government Whips in the House of Commons. 10 Downing Street is the official residence of the First Lord of the Treasury, and not of the Prime Minister. Chequers, a country house in Buckinghamshire, is the official country residence of the Prime Minister, used as a weekend and holiday home, although the
Principal Secretary to the Prime Minister of Pakistan Principal Secretary to the Prime Minister of Pakistan The Principal Secretary to the Prime Minister of Pakistan (also referred to as PSPM) is the administrative head and highest-ranking official of the Prime Minister's Office. The position holder is usually an officer belonging to the Pakistan Administrative Service serving in BPS-22 grade. The Principal Secretary advises and assists the Prime Minister on all the official business routed through the PM Office, and because of this the PSPM is generally regarded as the most crucial aide to the Prime Minister. The current Principal Secretary to the Prime Minister is Muhammad Azam Khan.