paid tribute to "one of the most remarkable people ever to grace British politics", who had "intellect, vision and an integrity that saw him hold firm to his beliefs of moderate social democracy, liberal reform and the cause of Europe throughout his life. He was a friend and support to me". James Callaghan and Edward Heath also paid tribute and Tony Benn said that as "a founder of the SDP he was probably the grandfather of New Labour". However, he was strongly criticised by others including Denis Healey, who condemned the SDP split as a "disaster" for the Labour Party which prolonged their time in opposition and allowed the Tories to have an unbroken run of 18 years in government. The Professor of Government at Oxford University, Vernon Bogdanor, provided an assessment in The Guardian: Roy Jenkins was both radical and contemporary; and this made him the most influential exponent of the progressive creed in politics in postwar Britain. Moreover, the political creed for which he stood belongs as much to the future as to the past. For Jenkins was the prime mover in the creation of a form of social democracy which, being internationalist, is peculiarly suited to the age of globalisation and, being liberal, will prove to have more staying power than the statism of Lionel Jospin or the corporatist socialism of Gerhard Schröder. ... Roy Jenkins was the first leading politician to appreciate that a liberalised social democracy must be based on two tenets: what Peter Mandelson called an aspirational society (individuals must be allowed to regulate their personal lives without interference from the state); and that a post-imperial country like Britain could only be influential in the world as part of a wider grouping (the EU). His alma mater, Cardiff University, honoured the memory of Roy Jenkins by naming one of its halls of residence Roy Jenkins Hall. Marriage and personal life On 20 January 1945, Jenkins married Mary Jennifer (Jennifer) Morris (18 January 1921 – 2 February 2017). They were married for almost 58 years until his death, although he had "several affairs", including one with Jackie Kennedy's sister Lee Radziwill. Among his long-term mistresses were Leslie Bonham Carter and Caroline Gilmour, wives of fellow MPs and close friends Mark Bonham Carter and Ian Gilmour. However, these extra-marital relationships were conditional on his lovers having a good relationship with his wife: he later stated that