Which British Prime Minister once was a chemist who worked on ice cream emulsifiers?

Margaret Thatcher (née Roberts; October 1925–April 2013) was a British stateswoman who served as Prime Minister of the United Kingdom from 1979 to 1990 and Leader of the Conservative Party from 1975 to 1990. She was born in Grantham, Lincolnshire, England and died in London.

She was the longest-serving British prime minister of the 20th century; she was the first woman to hold the office. A Soviet journalist dubbed her the "Iron Lady", a nickname that became associated with her uncompromising politics and leadership style. As prime minister, her governmental policies were known as Thatcherism.

When she (Roberts) graduated from Oxford in 1947 with second-class honors, it was with a 4-year Bachelor of Science Chemistry Degree, specializing in X-ray crystallography under the supervision of Dorothy Hodgkin, a British Nobel Prize winning chemist. Next, during her post-Oxford years (1947–1951) while working as a research chemist for J. Lyons and Co. in Hammersmith, as part of a team, she worked on developing emulsifiers for ice cream.

Margaret Thatcher (Baroness Thatcher of Kesteven) was Europe’s first woman prime minister. The only British prime minister in the 20th century to win three consecutive terms and, at the time of her resignation, Britain’s longest continuously serving prime minister since 1827. She took the British economy from statism to liberalism; she became, by personality and achievement, the most renowned British political leader since Winston Churchill.