Prime Minister of the United Kingdom official recognition given to the office had only been in the Treaty of Berlin in 1878, when Disraeli signed as "First Lord of the Treasury and Prime Minister of her Britannic Majesty". It wasn't until 7 years later, in 1885, did the official records entrench the institution of Prime Minister, using "Prime Minister" at the list of Government ministers printed in Hansard. Incumbents had no statutory authority in their own right. As late as 1904, Arthur Balfour explained the status of his office in a speech at Haddington: "The Prime Minister has no salary as Prime Minister. He has no
First Lord of the Treasury residence is also used by other senior members of government. Much of this list overlaps with the list of Prime Ministers of the United Kingdom, but there are some notable differences, principally concerning the Marquess of Salisbury, who was Prime Minister but not First Lord in 1885–86, 1887–92 and 1895–1902. Those First Lords who were simultaneously Prime Minister are indicated in bold; those First Lords who were considered Prime Minister only during part of their term are indicated in bold italic. Thereafter the posts of First Lord of the Treasury and Prime Minister have continually been held by the same