Question: British peer, Frederick Lambton, 4th Earl of Durham, joined a British political party formed by a faction that broke away from the Liberal Party in what year?

Context paragraphs:
National Liberal Party (UK, 1931): The National Liberal Party, known until 1948 as the Liberal National Party, was a liberal political party in the United Kingdom from 1931 to 1968.  It broke away from the Liberal Party, and later merged with the Conservative Party.

Frederick Lambton, 4th Earl of Durham: Frederick William Lambton, 4th Earl of Durham (19 June 1855 – 31 January 1929) was a British peer, a Liberal (and later Liberal Unionist) politician, and the son of George Lambton, 2nd Earl of Durham.  He inherited the Earldom from his twin brother, John Lambton, 3rd Earl of Durham, when the latter died with no legitimate children.

Liberal Unionist Party: The Liberal Unionist Party was a British political party that was formed in 1886 by a faction that broke away from the Liberal Party.  Led by Lord Hartington (later the Duke of Devonshire) and Joseph Chamberlain, the party formed a political alliance with the Conservative Party in opposition to Irish Home Rule.  The two parties formed the ten-year-long, coalition Unionist Government 1895–1905 but kept separate political funds and their own party organisations until a complete merger was agreed in May 1912.

Reginald Herbert, 15th Earl of Pembroke: Reginald Herbert, 15th Earl of Pembroke and 12th Earl of Montgomery (8 September 1880 – 13 January 1960) was a British peer.  His parents were Sidney Herbert, 14th Earl of Pembroke and Beatrix Louisa Lambton, daughter of George Lambton, 2nd Earl of Durham.  He descends from a Russian aristocratic family, the Woronzows, through the marriage of Catherine Woronzow to George Augustus Herbert, 11th Earl of Pembroke.

Liberal Party (Chile, 1849): The Liberal Party ("Partido Liberal") of Chile was a Chilean political party created by a faction of pipiolos in 1849.  After the conservative victory in the Chilean Civil War of 1829 the liberals became the principal opposition party to the Conservative Party.  During the Liberal Party's early history one of its main goal was to create a new constitution to replace the Chilean Constitution of 1833.  Rigged election helped to prevent the Liberal Party's presidential candidates to be elected until 1861, during that time elements of the liberal party made attempts to overthrow the government, these were the Revolution of 1851 and the Revolution of 1859.  These failed insurrections led a large number of liberals into exile, among them Benjamín Vicuña Mackenna.  In 1863 a group of liberal split off to form the Radical Party which would hold power from 1938 to 1952.  Originally an anticlericalist party that championed classical liberalism, the liberals later became a right-wing party.

John Lambton, 5th Earl of Durham: John Frederick Lambton, 5th Earl of Durham (7 October 1884 – 4 February 1970), briefly styled Viscount Lambton between 1928 and 1929, was a British peer.  Through his sister Lilian, he was an uncle of future Prime Minister Sir Alec Douglas-Home.  Lord Durham is best remembered for the donation of Penshaw Monument to the National Trust.

George Lambton, 2nd Earl of Durham: (George Frederick) D'Arcy Lambton, 2nd Earl of Durham (5 September 1828 – 27 November 1879), styled Viscount Lambton from 1833 to 1840, was a British peer.

Head on a Green Sofa: Head on a Green Sofa is an oil painting by Lucian Freud executed in 1960-61.  It is a portrait of the late Lady Lambton, wife of Antony Lambton, Viscount Lambton, 6th Earl of Durham.  It was sold at Sotheby's, London, 12 February 2014 by its then owner Edward Lambton, 7th Earl of Durham, for £2,994,500.

Western Australian Liberal Party (1911–17): The Western Australian Liberal Party was a political party which existed from 1911 until 1917 in the Australian state of Western Australia.  The Party, which had its roots in various earlier political movements, came together in the period immediately prior to the 1911 state election under the guidance of Sir John Forrest, the Federal member for Swan and former Premier of Western Australia, and other leading political figures in the State.  It was assembled in response to the solid organisation of the Labor Party and had the aim of assisting Ministerial members in winning seats and retaining power in the Western Australian Legislative Assembly.  The Party did not involve itself in Federal politics, although many of its members were also associated with the Commonwealth Liberal Party and assisted Liberal candidates and members from Western Australia in that capacity.  The massive defeat of the Ministerial faction by Labor in that election resulted in what remained of the faction formally joining the Liberal Party, which became the first organised non-Labor movement in the State and was a precursor to the Nationalist Party and, later, the modern Liberal Party of Australia (Western Australian Division).

Antony Lambton: Antony Claud Frederick Lambton, (10 July 1922 – 30 December 2006), briefly 6th Earl of Durham, styled before 1970 as Viscount Lambton, and widely known as "Lord Lambton", was a Conservative Member of Parliament and a cousin of Sir Alec Douglas-Home, the former Prime Minister and Foreign Secretary.  Lambton resigned from Parliament and ministerial office in 1973.

Supporting paragraphs: Frederick Lambton, 4th Earl of Durham Liberal Unionist Party
Answer: 1886