Age Ratings 

The the link above is the British Board of Film Classification(bbfc), and in this link it gives you all the criteria of all the age limits, British films are set at due to their contents. And this made me think about what age limit are film would be set at if the bbfc had to classify are film, would most likely be a (15) as the content of the film, is not that particularly bloody or that controversial with the language or opinion of characters on screen.