Prime Minister of the United Kingdom

01-January-1877 : Queen Victoria is proclaimed ''Empress of India'' by the ''Royal Titles Act 1876'', introduced by Prime Minister of the United Kingdom Benjamin Disraeli.
18-April-1880 : William Ewart Gladstone defeats Benjamin Disraeli in the United Kingdom general election to become Prime Minister for the second time.http://www.historichttp://www.historicuk.com/HistoryUK/Englanduk.com/HistoryUK/EnglandHistory/PrimeMinisters.htm
28-May-1937 : Neville Chamberlain becomes Prime Minister of the United Kingdom.
02-February-1945 : WWII: President Franklin D. Roosevelt and British Prime Minister Winston Churchill leave to meet with Soviet leader Joseph Stalin at the Yalta Conference.
04-February-1945 : WWII: President Franklin D. Roosevelt, Prime Minister of the United Kingdom Winston Churchill and Soviet leader Joseph Stalin begin the Yalta Conference (ends February 11).
26-October-1951 : Winston Churchill is rereelected Prime Minister of the United Kingdom; his foreign minister is Anthony Eden.
26-February-1952 : United Kingdom Prime Minister Winston Churchill announces that his nation has an atomic bomb.
05-April-1955 : Winston Churchill resigns as Prime Minister of the United Kingdom.
06-April-1955 : Anthony Eden becomes Prime Minister of the United Kingdom.
10-January-1957 : Harold Macmillan becomes the Prime Minister of the United Kingdom.