Although he never became Prime Minister, this son of a miner's leader had a far-reaching impact on British politics and society.
Roy Jenkins was the son of the Labour MP for Pontypool and miners' leader Arthur Jenkins. After studying at Oxford and wartime service, he followed his father into Parliament by winning the Southwark by-election in 1948.
More of an old-fashioned liberal than a socialist, he helped get the Sixties swinging as a reforming Home Secretary, relaxing the laws relating to abortion, censorship, divorce and homosexuality.
As Chancellor of the Exchequer he helped restore Labour's credibility after the devaluation crisis of 1967 but his political ambitions took a knock when his low-key budget was blamed for Labour's defeat at the 1970 General Election.
As a pro-European, Jenkins felt increasingly out of step with many in his party, resigning as deputy leader in 1972. Policies aside, his detractors viewed him as a snob, an aloof figure who'd forgotten his working class roots.
Although he served a second spell as Home Secretary when Labour returned to power in 1974, he later left Parliament to become Britain's first and so far only president of the European Commission.
Jenkins returned to British politics in dramatic style in 1981 as a member of the so-called "Gang of Four" leading Labour politicians who quit the party to set up the centrist Social Democratic Party (SDP).
The new party initially captured the imagination of dissatisfied voters, but their 50% poll ratings soon waned and eventually led to a merger with the Liberals to form the Liberal Democrats.
After earning a peerage, Jenkins devoted more time to life outside party politics, becoming Chancellor of Oxford University and writing acclaimed biographies of political figures such as Gladstone and Churchill.
The former Labour minister became a mentor to Tony Blair, and many see the influence of Jenkins and the Social Democrats on the moderate policies of New Labour.
Jenkins died suddenly at his home in Oxfordshire in January 2003, with Blair leading the tributes, describing him as "one of the most remarkable people ever to grace British politics."