Stored in Whitehall''s archives are everything from blood-chilling warnings of imminent nuclear attack to comical details of daily life in the corridors of power. Concerned notes from ministers on the subject of the Heir to the Throne''s potential brainwashing by Welsh terrorists are shelved alongside worries about housemaids ''on the wobble'' at Chequers. Detailed and surprising plans for royal funerals sit beside reports on suspected spies in the showbiz world and bawdy poetry about the monkeys on the Rock of GibraltarAnd Mary Whitehouse''s complaints about the sex education syllabus nestle next to thank-you notes from prisoner 13260/62, also known as Nelson Mandela. Adam Macqueen, author of the highly acclaimed bestseller Private Eye: The First 50 Years, has searched high and low to present us with some of the most unlikely revelations since the Official secrets act was inaugurated one hundred years agoNot only about Mrs Thatcher''s ironing board, but Ted Heath''s car, Harold Macm