The British Board of Film Classification (BBFC) assigns age ratings to movies to indicate what audiences a film is suitable for. The BBFC reviews films and assigns them one of several ratings: U for all ages, PG for parental guidance, 12A/12 and 15 for those at or above those ages only, 18 for adults only, and R18 for adults in licensed cinemas only. For their planned horror movie, the document recommends an 18 rating as horror films often contain mature themes unsuitable for younger viewers.