Grantham and eminent past students. Britain's first female Prime Minister, Margaret Thatcher, attended Kesteven and Grantham, and Isaac Newton famously attended The King's. Both have remained single-sex up to the age of 16. In 1970, Kesteven County Council (based in Sleaford) announced plans to turn the grammar schools into co-educational comprehensives for ages of 11–16 and leave Grantham College the only sixth form for the town. Later it was proposed to create two sixth-form colleges from one of the grammar schools. Other parts of Kesteven became comprehensive but responsibility for education passed to Lincolnshire under the local government reorganization of 1974,
Margaret Thatcher of the Conservative Party in 1975. As Prime Minister, Thatcher received two honorary distinctions: Two weeks after her resignation, Thatcher was appointed Member of the Order of Merit (OM) by the Queen. Her husband Denis was made a hereditary baronet at the same time. As his wife, Thatcher was entitled to use the honorific style "Lady", an automatically conferred title that she declined to use. She became Lady Thatcher in her own right upon her ennoblement in the House of Lords. In the Falklands, Margaret Thatcher Day has been marked each 10 January since 1992, commemorating her first visit to