Have you got what it takes to tackle Radio 4's most fiendish quiz?Question: A fictional criminal psychologist, a former Conservative minister, and the eponymous protagonist of a Peter Hedges novel, might all serve on the board alongside some big cheeses. Can you explain?*The Round Britain Quiz is the oldest broadcast quiz anywhere in the world. Created in 1947 it has built and maintained a cult following from across the generations. Each series sees six teams from around the UK competing against each other to solve a series of seriously cryptic clues, with a chairman giving a steer on how to get to the answer. Compiled by long-serving series producer, Paul Bajoria, and with an introduction from the Chairman, BBC journalist Tom Sutcliffe, The Round Britain Quiz Book features 250 of the toughest and most challenging questions from the last 70 years as well as many new and exclusive conundrums, drawing on unpredictable fields of knowledge, to truly test the nation. *Answer: They might all be found on a cheeseboard, as accompaniments to the cheese. The psychologist referred to is 'Fitz' in the TV series Cracker, the former MP is Eric Pickles, and Gilbert Grape is Peter Hedges' creation.