John Craven visits the Mardale Valley in Cumbria. The Lake District is one of the best-recognised landscapes in Britain, but in this neck of the woods, it's all set to change.At Haweswater Reservoir, John meets the people behind the new radical thinking to boost biodiversity. John also enjoys a very special breakfast with one of our rarest mammals, the red squirrel, and he meets wildlife film-maker and photographer Hamza Yassin to launch this year's Countryfile photographic competition with two new categories for children and young people. Adrian Chiles lifts the lid on Manx customs on the Isle of Man, Adam sells one of his prized Gloucester bulls, and Charlotte Smith investigates the recent poisoning of sea eagles in Southern England.