Pegi games rating enforced in the UK

The Pegi age ratings that we often see on games is rather confusing and often contradictory to movie certifications.
However, the Pan-European Game Information system rates video games at 12, 16 or 18 of age for games and are far more serious than previously experienced in the UK.
Those old ratings were offered by the BBFC and they simply mirrored film ratings, have now been dropped.
Now, however, anyone that rents or sells a game to anyone under the Pegi age advertised can be prosectured for a criminal offence. This has been done due to the worry that certain video games are getting to violent and need to be restricted. We only have to look at the fact that Call of Duty: Modern Warfare 3 suffers daytime ban.