Question: What record does Sir John Major hold since the death of Margaret Thatcher at the age of 87?

Context paragraphs:
Oxford University Conservative Association: The Oxford University Conservative Association (OUCA) is a student political organisation founded in 1924, whose members are drawn from the University of Oxford.  Since October 2009, OUCA has been affiliated to Conservative Future, the Conservative Party youth wing.  Until her death on 8 April 2013, the Patron of the association was Margaret Thatcher.  In the summer of 2015, Sir John Major became the new patron of the association.  The Honorary President is Jacob Rees-Mogg.

Baron Hesketh: Baron Hesketh, of Hesketh in the County Palatine of Lancaster, is a title in the Peerage of the United Kingdom.  It was created in 1935 for Sir Thomas Fermor-Hesketh, 8th Baronet, who had previously briefly represented Enfield in the House of Commons as a Conservative.  s of 2010 the titles are held by his grandson, the third Baron, who succeeded his father in 1955.  Lord Hesketh held junior ministerial positions in the Conservative administrations of Margaret Thatcher and John Major.  However, he lost his seat in the House of Lords after the House of Lords Act 1999 removed the automatic right of hereditary peers to sit in the upper chamber of Parliament.

Anthony Seldon: Sir Anthony Francis Seldon, {'1': ", '2': ", '3': ", '4': "} (born 2 August 1953), is Vice-Chancellor of the University of Buckingham, a contemporary historian, commentator and political author, known in part for his biographies of Margaret Thatcher, John Major, Tony Blair, Gordon Brown and David Cameron.  He was the 13th Master (headmaster) of Wellington College, one of Britain's co-educational independent boarding schools.  In 2009, he set up The Wellington Academy, the first state school to carry the name of its founding independent school.

92 Group: The 92 Group is a right-wing grouping within the British Conservative Party.  They are so named because they would meet at Conservative MP Sir Patrick Wall's home, 92 Cheyne Walk in Chelsea, London.  It was founded in 1964 in order to "keep the Conservative Party conservative" and membership is by invitation only.  During the period of Margaret Thatcher's leadership of the Conservative Party it was a prominent supporter of her policies.  During John Major's premiership it became a focus for Thatcherite MPs dissatisfied with his leadership and was prominent in supporting John Redwood's unsuccessful candidacy against John Major for the leadership of the Conservative Party in 1995.

Viscount Ullswater: Viscount Ullswater, of Campsea Ashe in the County of Suffolk, is a title in the Peerage of the United Kingdom.  It was created in 1921 for James Lowther upon his retirement as Speaker of the House of Commons.  He was the eldest son of the Hon. William Lowther, third son of the Hon. Henry Lowther, second son of William Lowther, 1st Earl of Lonsdale (see Earl of Lonsdale and Lowther Baronets for earlier history of the family).  The first Viscount lived to the age of 93, and was pre-deceased by both his eldest son the Hon. Christopher Lowther, a Conservative politician, and his eldest son's eldest son John Arthur Lowther (1910–1942) (who was Private Secretary to Prince George, Duke of Kent and was killed in the same air crash as him), the title being inherited by his seven-year-old great-grandson, the second and current Viscount, in an extremely rare instance of a great-grandson succeeding his great-grandfather in a peerage.  The second Viscount held office in the Conservative administrations of Margaret Thatcher and John Major and since 2003 he is one of the ninety elected hereditary peers that remain in the House of Lords after the passing of the House of Lords Act 1999.  As a descendant of the first Earl of Lonsdale he is also in remainder to this peerage and its subsidiary titles.  The current holder of the earldom, Hugh Lowther, 8th Earl of Lonsdale, is Lord Ullswater's fourth cousin.

John Major: Sir John Major, {'1': ", '2': ", '3': ", '4': "} (born 29 March 1943) is a British politician who was Prime Minister of the United Kingdom and Leader of the Conservative Party from 1990 to 1997.  He served as Foreign Secretary and then Chancellor of the Exchequer in the Thatcher Government from 1989 to 1990, and was the Member of Parliament (MP) for Huntingdon from 1979 until he retired in 2001.  Since Margaret Thatcher's death in 2013, he is the oldest living former Prime Minister.

Viscount Davidson: Viscount Davidson, of Little Gaddesden in the County of Hertford, is a title in the Peerage of the United Kingdom.  It was created in 1937 for the Conservative politician and former Member of Parliament for Hemel Hempstead, Sir J. C. C. Davidson.  His elder son, the second Viscount, notably served as Captain of the Yeomen of the Guard from 1986 to 1991 in the Conservative administrations of Margaret Thatcher and John Major.  However, he lost his seat in the House of Lords after the passing of the House of Lords Act 1999.  s of 2012 the title is held by his younger brother, the third Viscount, who succeeded in 2012.

Michael Portillo: Michael Denzil Xavier Portillo PC (born 26 May 1953) is a British journalist, broadcaster, and former Member of Parliament and Cabinet Minister.  He was first elected to the House of Commons in a by-election in 1984.  A strong admirer of Margaret Thatcher, and a Eurosceptic, Portillo served as a junior minister under both Thatcher and John Major, before entering the cabinet in 1992.  A "darling of the right", he was seen as a likely challenger to Major during the 1995 Conservative leadership election, but stayed loyal.  As Defence Secretary, he pressed for a purist Thatcherite course of "clear blue water", separating the policies of the Conservatives from Labour.

Death and funeral of Margaret Thatcher: Baroness Thatcher died of a stroke in London on 8 April 2013 at the age of 87.  On 17 April, the former Prime Minister was honoured with a ceremonial funeral.  Due to the polarised view of her achievements and legacy, reaction to her death was mixed throughout the United Kingdom, with her memory evoking both intense praise and criticism.  The funeral, including a formal procession through Central London, followed by a church service at St Paul's Cathedral, cost around £3.6 million including £3.1 million for security.  The funeral was notable for the attendance of Queen Elizabeth II.  All four of her successors as Prime Minister paid homage at the funeral.  Her body was cremated at Mortlake Crematorium following the funeral.

Thatcherism: Thatcherism describes the conviction politics, economic, social policy and political style of the British Conservative Party politician Margaret Thatcher, who was leader of her party from 1975 to 1990.  It has also been used to describe the beliefs of the British government under Thatcher as Prime Minister from 1979 to 1990, and beyond into the governments of John Major, Tony Blair and David Cameron.  An exponent or supporter of Thatcherism is regarded as a Thatcherite.

Supporting paragraphs: John Major Death and funeral of Margaret Thatcher
Answer: oldest living former Prime Minister