Denis Thatcher 1979 general election to become the first female Prime Minister in British history. Denis Thatcher became the first husband of a British Prime Minister. In 1953, they had twin children (Carol and Mark), who were born on 15 August, seven weeks premature. Thatcher was watching the 1953 Ashes series at the time of the birth. Not long after the 1964 general election, Denis Thatcher suffered a nervous breakdown which put a severe strain on their marriage. The breakdown was probably caused by the increasing pressure of running the family business, caring for his relatives, and his wife's preoccupation with her
Margaret Thatcher had been badly misinterpreted, arguing that race was never an important focus of Thatcherism. Throughout her premiership, both major parties took similar positions on immigration policy, having in 1981 passed the British Nationality Act with bipartisan support. There were no policies passed or proposed by her government aimed at restricting immigration, and the subject of race was never highlighted by Thatcher in any of her major speeches as Prime Minister. Many of Thatcher's policies had an influence on the Labour Party, which had returned to power in 1997 under Tony Blair. Blair rebranded the party "New Labour" in 1994 with