Countryfile is in North Cornwall. Matt Baker visits a stately home with an interesting past. Prideaux Place has been in the same family for fourteen generations and once housed American soldiers during the Second World War as they prepared for the D-Day landings. Matt gets access to the 'American Wing' which has remained untouched since 1943. Prideaux Place is thought to have the oldest fallow deer park herd in the country. Matt helps catch one special buck that's got himself in a spot of bother.Meanwhile, Helen Skelton is finding out why artists, writers and poets flock to Cornwall for inspiration. She also gets on her bike to test out a new woodland trail where cycling and conservation are working hand in hand. And Adam's in Dorset meeting a young shepherd and his Christmas lambs that are taking centre stage in a nativity.Tom Heap learns about plans to expand British farming to make the most of the increasing global market for dairy products. He travels to Wales to meet a farmer who is increasing his herd of dairy cattle and believes this is an opportunity not to be missed. But, Tom also hears from those who can't afford to expand - as well as people concerned about the consequences of producing more milk.