Question: David John Nicholson, is a former Conservative Party UK politician , officially the Conservative and Unionist Party, is a centre-right political party, in which country?

Context paragraphs:
Conservative–DUP agreement: The Conservative–DUP agreement, officially the Agreement between the Conservative and Unionist Party and the Democratic Unionist Party on Support for the Government in Parliament, was agreed between the Conservative Party and the Democratic Unionist Party (DUP) following the 2017 United Kingdom general election, which had resulted in a hung parliament.  Negotiations between the two parties began on 9 June, the day after the election, and the final agreement was signed and published on 26 June 2017.  The agreement, signed by the two parties' chief whips, Gavin Williamson for the Conservatives and Jeffrey Donaldson for the DUP, secures DUP confidence-and-supply support for a Conservative minority government led by Theresa May.

Conservative Party (UK): The Conservative Party, officially the Conservative and Unionist Party, is a centre-right political party in the United Kingdom.  It is currently the governing party, having been so since the 2010 general election, where a coalition government with the Liberal Democrats was formed.  In 2015, the Conservatives led by David Cameron won a surprise majority and formed the first Conservative majority government since 1992.  However, the 2017 snap election on Thursday 8 June resulted in a hung parliament, and the Conservatives lost their parliamentary majority.  They are reliant on the support of a Northern Irish political party, the Democratic Unionist Party (DUP), in order to command a majority in the House of Commons through a confidence-and-supply deal.  The party leader, Theresa May, has served as both Leader of the Conservative Party and Prime Minister since 13 July 2016.  It is the largest party in local government with 9,237 councillors.  The Conservative Party is one of the two major contemporary political parties in the United Kingdom, the other being its modern rival, the Labour Party.  The Conservative Party's platform involves support for free market capitalism, free enterprise, fiscal conservatism, a strong national defence, deregulation, and restrictions on trade unions.

Progressive Conservative Party of Ontario: The Progressive Conservative Party of Ontario (French: "Parti progressiste-conservateur de l'Ontario" ), often shortened to Ontario PC Party or PC, is a centre-right political party in Ontario, Canada.  The oldest political party in Ontario, it has governed the province for 80 of the 150 years since Confederation, including an uninterrupted run from 1943 to 1985.  It is the Official Opposition in the current Legislative Assembly of Ontario.  The party is made up of anywhere from libertarian conservatives supporting classical economics theory to moderate progressives supporting a more keynesian approach, positioning itself at different sides of this spectrum throughout its history

Progressive Conservative Party of New Brunswick: The Progressive Conservative Party of New Brunswick is a centre-right, conservative political party in the Canadian province of New Brunswick.  The party has its origins in the pre-Canadian confederation Conservative Party that opposed the granting of "responsible government" to the colony.  It has historically followed the Red Tory tradition.  The Progressive Conservative Party was last in provincial government between 2010 and 2014 under the leadership of David Alward.

Bareun Party: The Bareun Party (Hangul: 바른정당 ; Hanja: 바른政黨 ; RR: "Bareunjeongdang " ; lit.  Righteous Political Party) is a centre-right political party in South Korea, announced on 27 December 2016 with the defection of 29 anti-Park Saenuri Party lawmakers, it was known as the Conservative New Party for Reform until January 8, 2017.

UK European People's Party: The Alliance EPP: European People's Party UK, also known as UK EPP and the 4 Freedoms Party, is a pro-European Union, centre-right political party in the United Kingdom.  It first contested an election at the 2014 European Parliament elections.

Unionist Party (Scotland): The Unionist Party (Scottish Gaelic: "Buidheann na h-Aonachd" ; Scots: "Unionist Pairty" ), referred to as the Scottish Unionist Party outside Scotland, was the main centre-right political party in Scotland between 1912-65.  Use of the terms Unionist and Tory, as opposed to Conservative, is a consequence of the Scottish Unionists eschewing the name Conservative until 1965.

Croatian Democratic Union: The Croatian Democratic Union (Croatian: "Hrvatska demokratska zajednica" or HDZ) is a conservative political party and the main centre-right political party in Croatia.  It is one of the two major contemporary political parties in Croatia, along with the centre-left Social Democratic Party (SDP).  It is currently the largest party in the Sabor with 55 seats.  The HDZ ruled Croatia from 1990 after the country gained independence from Yugoslavia until 2000 and, in coalition with junior partners, from 2003 to 2011 as well as since 2016.  The party is a member of the European People's Party (EPP).

Unionist Party (Canada): The Unionist Party was a centre-right historical political party in Canada, composed primarily of former members of the Conservative party with some individual Liberal Members of Parliament.  It was formed in 1917 by MPs who supported the "Union government" formed by Sir Robert Borden during the First World War, and formed the government through the final years of the First World War, and was a proponent of conscription.  It was opposed by the remaining Liberal MPs, who sat as the official opposition.

David Nicholson (British politician): David John Nicholson (born 17 August 1944) is a former Conservative Party politician in the United Kingdom.

Supporting paragraphs: David Nicholson (British politician) Conservative Party (UK)
Answer: United Kingdom