WHAT I LIKED: 'Olympus Has Fallen' was a preposterous film with a sickeningly patriotic story executed well enough to make for something enjoyable and engaging, and the one glimmer that remains from that here is Gerard Butler's performance which does make for an occasionally likeable character, despite the blatant racism.
WHAT I DIDN'T LIKE: The problem is however that this film simply doesn't pack any of Antoine Fuqua's directorial nouse and instead winds up a pretty low-energy, tension-free action affair with little space for exploration of the characters to keep you engaged either. Without that stuff, all you're left with are the bare bones, and those arguably stink even more than last time with an unbelievably ludicrous plot, lashings of hideous patriotism (and at times, down-right racism), and utterly terrible dialogue.
VERDICT: Without the tight direction of the first film to keep things ticking over, 'London Has Fallen' leaves you with with the bare bones of a ridiculous plot and tonnes of flag-waving. It's crass rubbish, and this time there's precious little to distract you from that fact at all.