This document summarizes the different movie rating certificates in the UK. It describes the content restrictions for each rating: - U rating allows very mild language, kissing/cuddling but no sexual focus, and danger if balanced with reassurance. - PG allows mild language, non-graphic sex references, and non-graphic/non-detailed violence. - 12A allows stronger language including "fuck", brief sex scenes but no strong content, and some gore if not focused on. - 15 is like 12A but language can be more offensive, sexual activity shown briefly with references, and drugs shown without promoting use. - 18 allows strong language, violence with detail, drugs