very day this week, John Craven and the Countryfile Diaries team - Keeley Donovan, Jules Hudson, Paul Martin, and Margherita Taylor - bring you the most interesting stories of the season. In today's show, Margherita heads to one of Britain's smallest islands, St Michael's Mount, to find out what rising seas and coastal erosion could mean for some of our favourite summer holiday destinations and the people living there. Keeley discovers why Scottish seas are a treasure trove for snorkelers and divers, as she delves beneath the waves of a new 100-mile snorkelling trail on the west coast which has some of the clearest and wildlife-filled waters in Britain. Roy Taylor discovers how a landscape laid waste by coal mining has become a wonderful wildlife sanctuary. We'll be giving you our guide to some of the incredible assortment of weird and wonderful creatures of the sea we've been lucky enough to come across over the years on Countryfile. And Paul learns all you need to know about adopting your own brood of feathered friends.