A nationwide what's on magazine direct from the Royal Cornwall Show, in which Peter Purves and Gyn Freeman report on pony-trapping, tor-treading, witch-pricking, piskie-taking, pasty-stuffing, muck-spreading, Lizard-lounging, camel-jumping, Land's-Ending, St Michael's-Mounting Britain. Producers PETER EVERETT and KAY JAMIESON BBC Manchester long wave only