User blog comment:NETBLOXIA/British newscasts/@comment-25448820-20200912212915/@comment-25448820-20200912215714

Here are the UK ratings:

U - meaning Universal, or suitable for all PG 12 - becomes a 12A in cinemas, so kids under 12 can see if they are with an adult 15 18

IN OTHER WORDS

U is basically your G.

12 is basically your PG-13 with stricter measures.

15 is basically your R with stricter measures.

And 18 is basically your NC-17 with an age difference.