British movie posters
Unlike it’s U.S. counterpart the one-sheet, the standard UK movie poster size is known as a British Quad (or sometimes as a UK Quad or Quad Crown) and measures 40″ x 30″. The British quad movie posters are a favorite among collectors, especially since they usually involve changes and alterations from the film’s U.S. domestic key art in order to fit the quad’s horitzonal format, or sometimes completely different movie poster artwork.
Quad is still used here at the moment, but the one-sheet seems to be becoming used more and i would be suprised if it becomes the standard poster size.