The BBFC said 2004 movie Spider-Man 2 was similarly issued with a 12 certificate, rather than the less restrictive PG rating.
"It received a 12 because of its scenes of urban violence and the fact that role model Spider-Man used violence as a way of dealing with his problems."
If only Spidey had tried dialoguing with Dr. Octopus. Or had sought a U.N. resolution.
P.S.: The new Dr. Who is pretty good, actually, even if it does lack Jelly Babies.