The team visit Flat Holm, an island perched in the middle of the Bristol Channel. Tiny as it is, it packs a punch, as Matt Baker discovers the fascinating history of the place, from pirates and queens to the birthplace of radio. Ellie Harrison ducks for cover from divebombing gulls, while Joe Crowley investigates the water companies still dumping sewage into our rivers. Adrian Chiles coracles off the west coast of Wales as he discovers more fascinating tales from across our countryside, and to celebrate the platinum jubilee weekend, Adam finds out more about the Queen's passion for a special pony.