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 course. In 1842 Isaac Newton Watt's sister Elizabeth died, aged 25. This left Isaac's brother-in-law Frederick Thatcher a depressed widower. With few prospects, the brothers-in-law, now friends, left London to start life afresh in New Zealand. They sailed from Plymouth on the barque "Himalaya", and landed in New Plymouth, New Zealand, on 23 December 1843. At this time the colony consisted of 1091 people - 617 males and 474 females. In early 1844 Isaac started off as a merchant, and bought the Devon Hotel in New Plymouth. Frederick Thatcher started out as an architect in Wellington, and now his buildings