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,
Nicholas Parsons entitled "The Straight Man: My Life in Comedy", which was published in 1984, and he produced a book of memoirs in 2010 called "Nicholas Parsons: With Just a Touch of Hesitation, Repetition and Deviation". He appears annually at the Edinburgh Festival Fringe presenting his comedy chat show "The Happy Hour" at the Cabaret Bar at the Pleasance, and has done so since 2001. Parsons is the oldest intermittent broadcaster on BBC Radio (4). Sir David Attenborough is the next oldest intermittent broadcaster on BBC TV and radio. From 1988 to 1991, Parsons served as Rector of the University of St