Matt Baker and Anita Rani are at the stunning Montrose Basin in Angus in Scotland. The basin is a natural, almost circular, inland sea that is an internationally important site for wild fowl. Anita helps ranger Anna Cheshier conduct one of the regular bird counts and gets stuck in helping make special nesting tubes for the basin's ducks. She also discovers how treacherous the mud flats can be as she ventures out with one of only three specialist mud rescue teams in the whole of Scotland. Matt, meanwhile, finds out that the soft sands made the area the perfect place for the UK's first military airbase. Matt sees remnants of the runway next to the dunes and meets the enthusiasts building a replica of a one of the First World War's most famous planes, the de Havilland BE2. Tom Heap investigates what the EU referendum could mean for our countryside. This week he grills the prime minister and Boris Johnson on how they think it will affect the environment and our fisheries
