In 1975 he won Hit on the election of the new head of the conservative party and became the head of the parliamentary opposition, as well as the first woman to head one of the main parties in the UK.
Ring 1975, ida ngalahang Heath ring Pamilihan kapemimpinan Partai Konservatif manados Pamimpin Oposisi, anak istri kapertama sané mimpin partai politik ageng ring Britania Raya.