Rogue One: A Star Wars Story is given a 12A certificate by the BBFC.

Looking at the page on their website it also states the running time is 134 minutes (2hrs 14mins).

ROGUE ONE: A STAR WARS STORY (12A) moderate violence https://t.co/V9xn8I7o5f

— BBFC (@BBFC) December 7, 2016