Theresa May has officially stepped down as the leader of the Conservative Party on Friday, but will remain as prime minister until her successor is chosen in July, 2019. She announced her resignation saying it was a matter of deep regret that she had been unable to deliver Brexit. Her resignation may have made a no deal Brexit impossible to stop. German chancellor Angela Merkel said she had worked well with Theresa May but 'respected' the British PM's decision to quit Theresa May was the Prime Minister of the United Kingdom, in office since July 2016. The country's second female Prime Minister after fellow Conservative Margaret Thatcher May is a highly experienced politician who took over as UK's PM from David Cameron during a period of political uncertainty following Britain's withdrawal from the European Union. She was born Theresa Mary Brasier on October 1, 1956, Theresa May made her first foray into politics in 1986 when she became a councilor for the London Borough of Merton where she served as the Chairman of Education (1988-90) and Deputy Group Leader and Housing Spokesman (1992-94).