No, there are no hard and fast rules about sources, no printed booklet to help journalists through.
Ian HislopYou end up with this succession of periods when everything was marvellous - from King Arthur to the medieval times, Ivanhoe, chivalry, Henry VIII, Merry England, the Blitz
Ian HislopI've got a very peculiar sort of fame, based on being on the telly. It doesn't mean you have the lifestyle people expect.
Ian Hislop