How did this only get 12A?
Nowadays, UK films (mainly book adaptation) are getting cut for 12s here, there and everywhere. Hunger Games only needed minor (totalling about 7 seconds) cuts to get to a 12, so how on earth did the fist-through-chest get through as a 12? BBFC said that it was only 'fantasy violence', but the near future setting was only a year after the film's release and there was a lot of blood, too.
T3 would definitely be a 15 if released today.