Just watched Blitz. Really, really not worth it. It's littered with inaccuracies regarding police procedure, for one thing, but that's hardly the main problem. The plot is so incoherent I was genuinely worried that I might have blacked out and missed large portions of the film before so much as fifteen minutes had elapsed. The 'investigation' into the killings is handled so ham-handedly that I felt like screaming at the screen such things as, "What? How is that relevant? Why are you going there?" and "You've got the evidence! Right there! Why are you giving it back to him?" The protagonist is a ridiculous caricature, and the rest of the characters are either so bland as to be non-existent, or apparently from completely different films. I swear that some entire story elements were put in to fill out the time, because there's no relation to the main plotline at all.
Should have saved my money for X-Men tomorrow.