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,
Isaac Newton Watt Isaac Newton Watt Isaac Newton Watt (1821–1886) was a soldier, merchant and a Member of Parliament in Taranaki, New Zealand, in the mid to late 19th century. He was born in London some time in 1821, the son of Isaac Watt the land surveyor and Susanna Dunlop. His father Isaac (b. 1782) was born in Whitby, and was the son of a famous Whitby mariner, James Watt (b 1742). Isaac Newton Watt was the fourth of Isaac and Susanna's thirteen children. He studied medicine at St Bartholemew's Hospital in London, but ran out of money and could not complete the