Prime Ministers of the United Kingdom of Great Britain and Ireland, 1892-1932:
1892-1896: William Gladstone (Liberal)
1892 (Minority): Robert Gascoyne-Cecil, 3rd Marquess of Salisbury (Conservative and Liberal Unionst), Charles Stuart Parnell (Irish Parliamentary)
1896-1899: William Harcourt (Liberal)
1897 (Minority): Robert Gascoyne-Cecil, 3rd Marquess of Salisbury (Conservative and Liberal Unionst), Charles Stuart Parnell (Irish Parliamentary), Ernest Bax (Social Democratic & Labour Organisation)
1899-1909: Arthur Balfour (Conservative leading National Unionist Alliance)
1900: William Harcourt (Liberal), John Dillon (Irish People's), Ernest Bax (Social Democratic & Labour)
1904: William Harcourt (Liberal), John Dillon (Irish People's), Ernest Bax (Social Democratic & Labour)
1909-1911: Arnold Morley (Liberal)
1909 (Minority): Arthur Balfour (National), John Dillon (Irish People's), Edward Aveling (Social Democratic & Labour)
1911-1915: Arthur Balfour (National)
1911: Arnold Morley (Liberal), John Dillon (Irish People's), Edward Aveling (Social Democratic & Labour)
1915-1918: Arnold Morley (Liberal) †
1915 (Radical Coalition): Arthur Balfour (National), John Redmond (Irish People's), George Lansbury ("Radical" Labour), Ben Tillett (Independent Labour), Eoin MacNeil (Cumann na nGaedheal)
1918-1921: John Burns (Liberal)
1921-1930: Winston Churchill (National)
1921 (National Coalition): McKinnon Wood (Radical Coalition), James Connolly (Independent Labour), Eoin MacNeil (Cumann na nGaedheal), Horatio Bottomley (John Bull)
1923 (National Coalition): John Burns (Radical Coalition), James Connolly (Independent Labour), Horatio Bottomley (John Bull), Eoin MacNeil (Cumann na nGaedheal)
1930-1931: Nevil Macready, Lord Cheltenham (Independent)
1931-1932: David Lloyd George (Independent)
1931 (Constitutionalist Coupon): James Connolly (Independent Labour-Communist), Henry Page Croft (National), Michael O'Flanagan (Cumann na nGaedheal), Various (Independent Conservative)
1932 Commonwealth Constitution Referendum: 62% YES, 38% NO
Prime Ministers of the Commonwealth of Great Britain and Ireland:
1932-1938: David Lloyd George (Independent)
1933 (Radical Coalition): Samuel Hoare ("New" National), James Connolly (Independent Labour-Communist), Harold Harmsworth ("Old" National), Michael O'Flanagan (Cumann na nGaedheal)
1938-: Duff Cooper (Unionist)
1938: William Jowitt (Radical), James Maxton (Independent Labour-Communist), Ernest Brown (Centre), Michael Collins (Cumann na nGaedheal), Harold Harmsworth (Action)
1942: Clement Davies (Radical), James Maxton (Independent Labour), Michael Collins (Cumann na nGaedheal), Ernest Brown (Centre), Roland Muirhead (National League), Walter Guiness (Action)
1946: Charles Latham (Radical), Jim Griffiths (Independent Labour), Michael Collins (Cumann na nGaedheal), Ernest Brown (Centre), Roland Muirhead (National League), Walter Guiness (Action)
...
1971-1982: Allan Bertram (Radical) †
1971 (Coalition with Independent Labour): Charles Amery (Unionist), John Hillery (Saor Éire), David Lewis (Independent Labour), John Grimond (National League), J.M. Clark (Popular), John MacLay (Centre)
1975: Charles Amery (Unionist), John Hillery (Saor Éire), Hugh Hooson (Centre), David Lewis (Independent Labour), Paul Cathcart (National League), J.M. Clark (Popular)
1979: Michael Cosgrave (Unionist-Irish Reform), John Hillery (Saor Éire), Hugh Hooson (Centre), Paul Cathcart (National League), Samuel Heffer (Independent Labour)
1982-1983: Ernest Silkin (Radical)
1983-1985: Sebastian Taggart (Unionist)
1983: Ernest Silkin (Radical), Peadar McGlone (Saor Éire), Josephine Clay (Centre), Iain Currie (National League), Collective Leadership (Democratic Left-Values), J.M. Clark (Ecumene)
1985-1989: Sebastian Taggart (Unionist leading War Government)
1989-1992: George Holland (Radical)
1989 (Coalition with Centre): Sebastian Taggart (Unionist - Unity), Josephine Clay (Centre), Garrett Knox (Saor Éire), Samuel Heffer (Democratic Left), Various (Independent Progressives - Unity), Iain Currie (National League), Robert Stokes (Ecumene)
1992-1993: Les Weaver (Radical)
1993-2006: Thomas Caro (Unionist)
1994 (New Britain): Les Weaver (Radical), Josephine Clay (Centre - New Britain), Garrett Knox (Saor Éire), Gordon Findlay (Democratic Left), Roy Gibbs (Ecumene)
1998 (New Britain): Daniel Pritchard (Radical), Tom Newman (Centre - New Britain), Garrett Knox (Saor Éire), Gabriel Salis (Democratic Left ) Roy Gibbs (Ecumene)
1999 Irish Independence Referendum: Yes 46%, No 54%
2003 (New Britain): Brian Smith (Radical), Tom Newman (Centre - New Britain), Roy Gibbs (Ecumene), Collective Leadership (Democratic Left-Values Alliance), Rian Jamieson (Saor Éire)
2006-2007: Leo Gardner (Unionist)
2007-2010: Anne-Marie Bertram (Radical)
2007: Leo Gardner (Unionist - New Britain), Pauline Kirk (Ecumene), Sinéad Mulley (Saor Éire), Graham Vries (Democratic Left), Oliver Church (Centre - New Britain)
2010-2013: Leo Gardner (Unionist)
2010 (Minority with Ecumene support): Anne-Marie Bertram (Radical), Pauline Kirk (Ecumene), Sinéad Mulley (Saor Éire), Graham Vries (Democratic Left), Hamid Jaffrey (Centre),
2013-: Helen Kendrick (Radical)
2013 (Minority): George Mantel (Unionist), Duncan Hanlan (Ecumene), Sinéad Mulley (Saor Éire), Isadore Porter (Centre), Graham Vries (Democratic Left))
2017 (Majority): Liz Wolmar (Unionist), Lonan Corrigan (Saor Éire), Duncan Hanlan (Ecumene), Isadore Porter (Centre), James Pritt (Democratic Left)