Squirrel dude.... don't over react old chum. Let the dust settle, let the boys and girls of the emergency services do what they have practiced for, and hope this event will not be too expensive in life. When the London situation is in hand, then the inevitable fingers will be pointed. I don't support Our Tone that often, but if the PM stays in London all the time 'just in case' then it would affect the Govt, and these terrorists would have a small victory!
As for controlling the news, I would like to echo another comment on a different thread. The BBC's report of 'Scenes of Chaos'. From the T.V. pictures, it looked to me as though the emergency services really had as much control as possible over the situation. Credit to the public as well from what we have seen.
Fingers crossed for all.