[Osem]

Apparently there's chaos in the Tottenham Court Road area and the tube there as a result of some lone maniac who's holed up in an office. It seems he may be a disgruntled employee and there's reports that he's got gas canisters strapped to him but of course that could be just Chinese whispers and media exaggeration at work.

He'll probably turn out to be a sad idiot with no terrorist links whatsoever but it all goes to show how the police can't take any chances so have to lock things down. In a major city like London that's going to very rapidly cause widespread chaos.

The sad truth is that if the terrorists (or anyone else for that matter) want to bring London to a halt it only needs a few of them to emulate this guy and they'll do a very nice job.