BBFC: 18

From Wikipedia:

The British Board of Film Classification (BBFC), originally British Board of Film Censors, is a non-governmental organisation, funded by the film industry and responsible for the national classification of films within the United Kingdom. It has a statutory requirement to classify videos, DVDs and some video games under the Video Recordings Act 2010.

18 - Suitable only for adults. Nobody younger than 18 may see an 18 film in a cinema. No-one younger than 18 can rent or buy an 18 rated VHS, DVD, Blu-ray Disc, UMD or game.