Chancellor of the Exchequer of its interest rates. The chancellor also has oversight of public spending across Government departments. The holder of the office of Chancellor of the Exchequer is "ex officio" Second Lord of the Treasury as a member of the commission exercising the ancient office of Lord High Treasurer. As the Second Lord, his official residence is 11 Downing Street in London, next door to the residence of the First Lord of the Treasury (a title that has for many years been held by the prime minister), who resides in 10 Downing Street. While in the past both houses were private residences,
Secretary to the Treasury Secretary to the Treasury In the United Kingdom, there are several Secretaries to the Treasury, who are Treasury ministers nominally acting as secretaries to HM Treasury. The origins of the office are unclear, although it probably originated during Lord Burghley's tenure as Lord Treasurer in the 16th century. The number of secretaries was expanded to two by 1714 at the latest. The Treasury ministers together discharge all the former functions of the Lord Treasurer, which are nowadays nominally vested in the Lords Commissioners of the Treasury. Of the Commissioners, only the Second Lord of the Treasury, who is also the