Shit, haven't seen Attack the Block, it had only just come out when I was leaving for Japan, I think, and downloading stuff via I Tunes is tricky here (no doubt someone more tech-savvy can suggest something). Point remains, if Bat recommends it, it must be good.  Bat is intellectually terrifying and, largely, the best of England.

Ha! That Bat! Now there's a man you don't meet everyday.