The British Board of Film Classification classifies films in the UK and outlines the criteria for 15 and 18 ratings. A 15 rating means those under 15 cannot see the film in theaters or rent/buy the DVD, and may contain strong violence, language, sexual content, or references to sexual violence. An 18 rating indicates those under 18 cannot see the film or rent/buy the DVD, and can feature very strong violence, language, sexual activity including violence, strong horror, or real sex scenes.