Night Wolf

This is a U.K film about a group of twenty-somethings who are having a few drinks in a barn at Sarah's house which is in the countryside of England. They are all enjoying themselves until the power goes off due to the storm outside. So they venture in to the mansion which is in a state of repair and find themselves being tracked through the house by something that is wolf like. They are in a world of trouble as it corners them in the attic. How are they going to get out of there, and will they all survive the 13 hours until morning?