[PAR] [TLE] Wilberforce (cat) [SEP] Wilberforce was a cat who lived at 10 Downing Street between 1973 and 1986 and served under four British Prime Ministers: Edward Heath, Harold Wilson, Jim Callaghan and Margaret Thatcher.  His chief function was to catch mice, in which role he was the successor to Peta.  In life he had been referred to as "the best mouser in Britain", as befitted his role. [PAR] [TLE] Edward Heath [SEP] Sir Edward Richard George Heath, (9 July 1916 – 17 July 2005), better known as Ted Heath, was a British politician who served as Prime Minister of the United Kingdom from 1970 to 1974 and Leader of the Conservative Party from 1965 to 1975.  He was a strong supporter of the European Communities (EC), and after winning the decisive vote in the House of Commons by 336 to 244, he led the negotiations that culminated in Britain's entry into the EC on 1 January 1973.  It was, says biographer John Campbell, "Heath's finest hour".  Although he planned to be an innovator as Prime Minister, his government foundered on economic difficulties, including high inflation and major strikes.  He became an embittered opponent of Margaret Thatcher, who supplanted him as party leader in 1975.
[PAR] [TLE] Wilberforce ( cat ) [ SEP ] Wilberforce was a cat who lived at 10 Downing Street between 1973 and 1986 and served under four British Prime Ministers : Edward Heath , Harold Wilson , Jim Callaghan and Margaret Thatcher . His chief function was to catch mice , in which role he was the successor to Peta . In life he had been referred to as " the best mouser in Britain " , as befitted his role . [PAR] [TLE] Edward Heath [ SEP ] Sir Edward Richard George Heath , ( 9 July 1916 – 17 July 2005 ) , better known as Ted Heath , was a British politician who served as Prime Minister of the United Kingdom from 1970 to 1974 and Leader of the Conservative Party from 1965 to 1975 . He was a strong supporter of the European Communities ( EC ) , and after winning the decisive vote in the House of Commons by 336 to 244 , he led the negotiations that culminated in Britain 's entry into the EC on 1 January 1973 . It was , says biographer John Campbell , " Heath 's finest hour " . Although he planned to be an innovator as Prime Minister , his government foundered on economic difficulties , including high inflation and major strikes . He became an embittered opponent of Margaret Thatcher , who supplanted him as party leader in 1975 .
What British Prime Minister did Wilberforce serve under who became party leader in 1975?
What British Prime Minister did Wilberforce serve under who became party leader in 1975 ?
Margaret Thatcher
Margaret Thatcher