The Thatched Barn was a two-storey mock-Tudor hotel built in the 1930s on the Barnet by-pass in Borehamwood, Hertfordshire, England. It was bought by holiday camp founder, Billy Butlin, before being requisitioned as Station XV by the Special Operations Executive (SOE) in World War Two, and used to train spies. In the 1960s, it became a Playboy Club, and later it became associated with Elstree Film Studios, and was used as a location for TV series The Saint, and later The Prisoner.