No, there are no hard and fast rules about sources, no printed booklet to help journalists through.
Ian HislopThere's an awful lot of terrible television which I could do, but I mostly stick to Have I Got News for You.
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 Hislop