Question: Who is this British politician and former Prime Minister of the United Kingdom who also contributed to the policy-making system of the Labour Party?

Context paragraphs:
Navin Ramgoolam: Navinchandra Ramgoolam, GCSK, FRCP (born 14 July 1947) is a former Prime Minister of Mauritius and leader of the Labour Party.  He was Leader of the Opposition from 1991 to 1995.  He served as Prime Minister for the first time from December 1995 until September 2000, and became Leader of the Opposition again from October 2000 to 4 July 2005.  On 5 July 2005, he became prime minister for a second term after his Alliance Sociale won the general elections.  He served again as Prime Minister from 2005 to 2014, when he was defeated afterwards.

Premiership of Tony Blair: The premiership of Tony Blair began on 2 May 1997 and ended on 27 June 2007.  Whilst serving as Prime Minister of the United Kingdom, Blair concurrently served as the First Lord of the Treasury, the Minister for the Civil Service, the Leader of the Labour Party (until Gordon Brown was declared Labour leader on 24 June 2007), and a member of parliament for the constituency of Sedgefield in County Durham.  He remains a Privy Counsellor having first been appointed in July 1994 when he became Leader of the Opposition.  Tony Blair is the Labour Party's longest-serving Prime Minister, and having led the party to three consecutive general election victories, the only Labour prime minister to serve two full consecutive terms.

United Kingdom local elections, 1980: Local elections were held in the United Kingdom in 1980.  These were the first annual local elections for the new Conservative Prime Minister Margaret Thatcher.  Though the Conservatives in government lost seats, the projected share of the vote was close: Labour Party 42%, Conservative Party 40%, Liberal Party 13%.  Labour were still being led by the former prime minister James Callaghan, who resigned later in the year to be succeeded by Michael Foot.

West Indies Federal Labour Party: The West Indies Federal Labour Party (or WIFLP) was one of the two main Federal parties in the short-lived West Indies Federation.  The party was the first national party of the planned West Indies Federation.  It was organised by Norman Manley, Grantley Adams, V. C. Bird, Robert Llewellyn Bradshaw, Joseph Nathaniel France, Eric Gairy, Carl La Corbinière and William Henry Bramble in June 1956 as the Federation of Labour Parties of the British Caribbean.  However, at its inaugural conference on September 1, 1956 in St. Lucia, its name was changed to the Caribbean Federal Labour Party.  Only later on did its name finally change to the West Indies Federal Labour Party (although it was also mistakenly called the West Indian Federal Labour Party or the West Indies Federal Party).  The WIFLP then went on to contest and win the Federal elections in 1958.  Since neither Manley nor Eric Williams contested the Federal elections, Sir Grantley Adams became the Prime Minister.  The Opposition party was the Democratic Labour Party.

Clement Attlee: Clement Richard Attlee, 1st Earl Attlee, {'1': ", '2': ", '3': ", '4': "} (3 January 1883 – 8 October 1967) was a British Labour politician who served as Prime Minister of the United Kingdom from 1945 to 1951 and Leader of the Labour Party from 1935 to 1955.  In 1940, Attlee took Labour into the wartime coalition government and served under Winston Churchill, becoming the first person to hold the office of Deputy Prime Minister of the United Kingdom.  He went on to lead the Labour Party to an unexpected landslide victory at the 1945 general election; forming the first Labour majority government, and a mandate to implement its postwar reforms.  The 12.0% national swing from the Conservatives to Labour was unprecedented at that time and remains the largest ever achieved by any party at a general election in British electoral history.  He was re-elected with a narrow majority at the 1950 general election.  In the following year, Attlee called a snap general election, hoping to increase his parliamentary majority.  However, he was narrowly defeated by the Conservatives under the leadership of Winston Churchill; despite winning the most votes of any political party in any general election in British political history until the Conservative Party's fourth consecutive victory in 1992.  Attlee remains the longest-ever serving Leader of the Labour Party.

James Callaghan: Leonard James Callaghan, Baron Callaghan of Cardiff, {'1': ", '2': ", '3': ", '4': "} (27 March 1912 – 26 March 2005), often known as Jim Callaghan, was a British politician who served as Prime Minister of the United Kingdom from 1976 to 1979 and Leader of the Labour Party from 1976 to 1980.  Callaghan is to date, the only British politician in history to have served in all four of the "Great Offices of State", having been Chancellor of the Exchequer from 1964–67, Home Secretary from 1967-70, and Foreign Secretary from 1974, until his appointment as Prime Minister in 1976.  As Prime Minister, he had some successes, but is mainly remembered for the "Winter of Discontent" of 1978–79.  During a very cold winter, his battle with trade unions led to massive strikes that seriously inconvenienced the public, leading to his defeat in the polls by Conservative leader Margaret Thatcher.

Joint Policy Committee: The Joint Policy Committee of the British Labour Party is part of the policy-making system of the party, set up by leader Tony Blair as part of the Partnership in Power process.

Tony Blair: Anthony Charles Lynton Blair (born 6 May 1953) is a British politician who served as Prime Minister of the United Kingdom from 2 May 1997 to 27 June 2007 and Leader of the Labour Party from 21 July 1994 to 24 June 2007.  He previously served as Leader of the Opposition from 21 July 1994 to 2 May 1997.  He is the most recent British Labour Party leader to have won a general election.

National Policy Forum: The National Policy Forum (NPF) of the British Labour Party is part of the policy-making system of the Party, set up by Leader Tony Blair as part of the Partnership in Power process.

John Prescott: John Leslie Prescott, Baron Prescott, (born 31 May 1938) is a British politician who was the Deputy Prime Minister of the United Kingdom from 1997 to 2007.  Born in Prestatyn, Wales, he represented Hull East as the Labour member of parliament from 1970 to 2010.  In the 1994 leadership election, he stood for both Leader and Deputy Leader of the Labour Party, winning election to the latter office.  He was appointed Deputy Prime Minister after Labour's victory in the 1997 election, with an expanded brief as Secretary of State for the Environment, Transport and the Regions.

Supporting paragraphs: Joint Policy Committee Tony Blair
Answer: Tony Blair