The BBFC is responsible for classifying all films released in UK cinemas and on home video. They use a rating system of U, PG, 12A, 15, and 18 to provide guidance on audience suitability based on factors like violence, language, sex, and drug use. The BBFC reviews films independently but local councils can override their ratings. Their guidelines define what content is appropriate at each rating level to help parents make viewing decisions for children. While the BBFC has no legal authority for cinemas, they are required by law to rate videos, and their ratings are usually followed to avoid potential censorship issues or bans.