In this edition, Margherita heads to St Michael's Mount, one of Britain's smallest islands, to learn what rising seas and coastal erosion could mean for its residents and for some of the country's favourite holiday destinations. Keeley delves into some of the clearest and wildlife-filled waters in Britain along a new 100-mile snorkelling trail on the west coast of Scotland. Roy Taylor discovers how a landscape laid waste by coal mining has become a wonderful wildlife sanctuary, while Paul reveals what people need to know about adopting their own brood of feathered friends.