1908-1910: H.H. Asquith (Liberal majority)
1910-1915: H.H. Asquith (Liberal minority with IPP confidence and supply)
1910 (January): Arthur Balfour (Conservative), John Redmond (IPP), Arthur Henderson (Labour), William O'Brien (All-for-Ireland)
1910 (December): Arthur Balfour (Conservative), John Redmond (IPP), George Nicoll Barnes (Labour), William O'Brien (All-for-Ireland)
1915-1918: H.H. Asquith (Liberal leading Wartime Coalition)
1918-1918: John Simon (Liberal leading Wartime Coalition)
1918-1919: Andrew Bonar Law (Conservative minority)
1918: John Simon (Liberal), Éamon de Valera (Sinn Féin), Arthur Henderson (Labour)
1919-1920: Austen Chamberlain (Conservative minority)
1920-1925: John Simon (Liberal minority with ‘Free Conservative’ and Labour confidence and supply)
1920: Austen Chamberlain (Conservative), Arthur Henderson (Labour)
1925-1925: John Simon (Liberal minority with 'Free Conservative' confidence and supply)
1925-1932: John Simon (Centre majority)
1925: Douglas Hogg (Conservative), Ramsay MacDonald (Labour), Christopher Addison (Independent Liberal)
1929: Ramsay MacDonald (Labour), Douglas Hogg (Conservative), Christopher Addison (Independent Liberal)
1932-1935: Arthur Greenwood (Labour minority with Independent Liberal confidence and supply)
1932: John Simon (Centre), Oliver Locker-Lampson (Conservative), Christopher Addison (Independent Liberal)
1935-1937: John Simon (Centre majority)
1935: Arthur Greenwood (Labour), Oliver Locker-Lampson (Conservative), Clement Davies (Independent Liberal)
1937-1940: Arthur Salter (Centre majority)
1940: Wilfred Paling (Labour), Clement Davies (Commonwealth), Philip Cunliffe-Lister (Conservative), Oliver Locker-Lampson (United Britons)
1940-1942: Arthur Salter (Centre leading Wartime Coalition)
1942-1944: Gwilym Lloyd George (Centre leading Wartime Coalition)
1944-1949: Gwilym Lloyd George (Centre majority)
1944: Wilfred Paling (Labour), Frederick Bellenger (United Britons), Clement Davies (Commonwealth)
1949-1954: Vincent Tewson (Labour majority)
1949: Gwilym Lloyd George (Centre), John Bannerman (Commonwealth), Frederick Bellenger (United Britons)
1954-1955: Gwilym Lloyd George (Centre majority)
1954: Vincent Tewson (Labour), John Bannerman (Commonwealth), Frederick Bellenger (United Britons)
1955-1959: David Eccles (Centre majority)
1959-1959: Vincent Tewson (Labour minority)
1959 (May): David Eccles (Centre), John Bannerman (Commonwealth), Duncan Sandys (United Britons)
1959-1960: Vincent Tewson (Labour majority)
1959 (November): David Eccles (Centre), John Bannerman (Commonwealth), Duncan Sandys (United Britons)
1960-1968: Aubrey Jones (Labour majority)
1963: Jo Grimond (Centre), Duncan Sandys (United Britons), Gwynfor Evans (Commonwealth)
1968-: Jo Grimond (Centre-Commonwealth coalition)
1968: Aubrey Jones (Labour), Gwynfor Evans (Commonwealth), Airey Neave (United Britons)
(Footnotes are coming, don't worry)
1910-1915: H.H. Asquith (Liberal minority with IPP confidence and supply)
1910 (January): Arthur Balfour (Conservative), John Redmond (IPP), Arthur Henderson (Labour), William O'Brien (All-for-Ireland)
1910 (December): Arthur Balfour (Conservative), John Redmond (IPP), George Nicoll Barnes (Labour), William O'Brien (All-for-Ireland)
1915-1918: H.H. Asquith (Liberal leading Wartime Coalition)
1918-1918: John Simon (Liberal leading Wartime Coalition)
1918-1919: Andrew Bonar Law (Conservative minority)
1918: John Simon (Liberal), Éamon de Valera (Sinn Féin), Arthur Henderson (Labour)
1919-1920: Austen Chamberlain (Conservative minority)
1920-1925: John Simon (Liberal minority with ‘Free Conservative’ and Labour confidence and supply)
1920: Austen Chamberlain (Conservative), Arthur Henderson (Labour)
1925-1925: John Simon (Liberal minority with 'Free Conservative' confidence and supply)
1925-1932: John Simon (Centre majority)
1925: Douglas Hogg (Conservative), Ramsay MacDonald (Labour), Christopher Addison (Independent Liberal)
1929: Ramsay MacDonald (Labour), Douglas Hogg (Conservative), Christopher Addison (Independent Liberal)
1932-1935: Arthur Greenwood (Labour minority with Independent Liberal confidence and supply)
1932: John Simon (Centre), Oliver Locker-Lampson (Conservative), Christopher Addison (Independent Liberal)
1935-1937: John Simon (Centre majority)
1935: Arthur Greenwood (Labour), Oliver Locker-Lampson (Conservative), Clement Davies (Independent Liberal)
1937-1940: Arthur Salter (Centre majority)
1940: Wilfred Paling (Labour), Clement Davies (Commonwealth), Philip Cunliffe-Lister (Conservative), Oliver Locker-Lampson (United Britons)
1940-1942: Arthur Salter (Centre leading Wartime Coalition)
1942-1944: Gwilym Lloyd George (Centre leading Wartime Coalition)
1944-1949: Gwilym Lloyd George (Centre majority)
1944: Wilfred Paling (Labour), Frederick Bellenger (United Britons), Clement Davies (Commonwealth)
1949-1954: Vincent Tewson (Labour majority)
1949: Gwilym Lloyd George (Centre), John Bannerman (Commonwealth), Frederick Bellenger (United Britons)
1954-1955: Gwilym Lloyd George (Centre majority)
1954: Vincent Tewson (Labour), John Bannerman (Commonwealth), Frederick Bellenger (United Britons)
1955-1959: David Eccles (Centre majority)
1959-1959: Vincent Tewson (Labour minority)
1959 (May): David Eccles (Centre), John Bannerman (Commonwealth), Duncan Sandys (United Britons)
1959-1960: Vincent Tewson (Labour majority)
1959 (November): David Eccles (Centre), John Bannerman (Commonwealth), Duncan Sandys (United Britons)
1960-1968: Aubrey Jones (Labour majority)
1963: Jo Grimond (Centre), Duncan Sandys (United Britons), Gwynfor Evans (Commonwealth)
1968-: Jo Grimond (Centre-Commonwealth coalition)
1968: Aubrey Jones (Labour), Gwynfor Evans (Commonwealth), Airey Neave (United Britons)
(Footnotes are coming, don't worry)