See http://www.bbc.co.uk/news/uk-30454240 .
We are told that UK airspace has been restricted due to a "computer glitch". The cynic in me says there may be a far more sinister explanation: either terrorists have compromised the NATS computers or there was a terrorist threat to a plane or planes and the "powers that be" closed (some of) the airspace. Of course it could all be perfectly true and there really was a computer glitch.
Also we have still not seen a single piece of evidence that Malaysian Airlines flight MH370 crashed in an ocean. Surely, after all this time something of the wreckage would have been seen?