Four sets of B&b owners take it in turns to host each other at their establishments, ultimately judging the hospitality and venue by choosing how much above or below the going room charge rate they choose to pay. At the end of each visit the guests will fill in an anonymous feedback form, which the hosts will then read. The hosts won't know who's said what or how much they've been paid, but they will know what their guests thought of them - both good and bad. In this episode, we go to Nateby Inn in Cumbria. Landlady Gaynor Walker's guests get competitive at a brewery cask-rolling competition, before one of her guests, Bob, reveals that he used to live in a cave. (hd)