John Craven and Helen Skelton head to Surrey. John explores the countryside beloved by Sir Arthur Conan Doyle and gets a sneak peek inside his former home. He also discovers that it was a Surrey resident who was instrumental in the formation of the National Trust. Helen meets an artist with an all-consuming passion for horses, then meets the inspirational people she hopes will get her back in the saddle. Adam takes a trip to the North Yorkshire coast to meet a farmer who keeps a rare breed of sheep - the Leicester Longwool. In 2012 David Cameron told Countryfile that he was going to make it easier for communities to stop big housing estates being 'plonked' right next to their villages. Two years on, has the prime minister kept his promise? Tom Heap investigates.