These rating are issued by the bbfc.
Suitable for all.
No one younger than 12 may see a ‘12A’ film in a cinema unless accompanied by an adult, and films classified ‘12A’ are not recommended for a child below 12. An adult may take a younger child if, in their judgement, the film is suitable for that particular child. In such circumstances, responsibility for allowing a child under 12 to view lies with the accompanying adult.
No-one younger than 15 may see a '15' film in a cinema.
No-one younger than 18 may see an '18' film in a cinema.
For more detailed information on film classifications please visit the British Board of Film Classification (BBFC) Website.