And the BBFC didn't care one way or another
I bet most content submitted for classification is utter dreck. Bad foreign animations, bollywood movies, vids about recovering from surgery, hilights from the 1995 season of some 3rd division football team, new age whalesongs, warehouse training vids etc. etc.
I bet the BBFC doesn't care what they're rating. It's their job to rate content, they get paid by the hour and they rate it. When they're done they move onto the next thing. Nobody is sticking it to the BBFC by making them watch paint dry.