Timeline: British PM 20th century

Period: 1895 to 1902

Robert Gascoyne-Cecil 3rd Marquess of Salisbury

conservative
Period: 1902 to 1905

Arthur James Balfour

conservative
Period: 1905 to 1908

Sir Henry Campbell-Bannerman

liberal
Period: 1908 to 1916

Herbert Henry Asquith

liberal
Period: 1916 to 1922

David Lloyd George

liberal
Period: 1922 to 1923

Andrew Bonar Law

conservative
Period: 1923 to 1924

Stanley Baldwin

conservative
Period: 1924 to 1924

James Ramsey MacDonald

labour
Period: 1924 to 1929

Stanley Baldwin

conservative
Period: 1929 to 1935

James Ramsey MacDonald

labour
Period: 1935 to 1937

Stanley Baldwin

conservative
Period: 1937 to 1940

Neville Chamberlain

conservative
Period: 1940 to 1945

Sir Winston Churchill

conservative
Period: 1945 to 1951

Clement Atlee

labour
Period: 1951 to 1955

Sir Winston Churchill

conservative
Period: 1955 to 1957

Sir Anthony Eden

conservative
Period: 1957 to 1963

Harold Macmillan

conservative
Period: 1963 to 1964

Sir Alex Douglas-Home

conservative
Period: 1964 to 1970

Harold Wilson

labour
Period: 1970 to 1974

Sir Edward Heath

conservative
Period: 1974 to 1976

Harold Wilson

labour
Period: 1976 to 1979

James Callaghan

labour
Period: 1979 to 1990

Baroness Margaret Thatcher

conservative
Period: 1990 to 1997

Sir John Major

conservative
Period: 1997 to 2007

Tony Blair

labour
Period: 2007 to 2010

Gordon Brown

labour

Robert Gascoyne-Cecil 3rd Marquess of Salisbury