R18 (British Board of Film Classification)
R18 (Restricted 18) is a film and video classification given by the British Board of Film Classification (BBFC). It is intended to provide a classification for works that do not breach UK law, but exceed what the BBFC considers acceptable in the 18 category. In practice, this means hardcore pornography.
Under the terms of the Video Recordings Act 1984 all non-exempt videos sold or distributed within the UK must be given a certificate by the BBFC. The distributor must decide whether a video is exempt. Uncertificated recordings are not illegal, regardless of content (except where the content itself is illegal), but supply (i.e. sale, rental, loan or gift) of them is. The R18 certificate is the most restrictive of the certificates, allowing films in the category to be shown only in specially licensed cinemas, or sold in licensed sex shops; admission to R18-rated films or sale of R18-rated recordings is restricted to persons aged 18 years and over.