I followed one of th "flightradar" links on here, told Zero Alpha it was going down and went next door to listen to 70s music and destroy Montezuma's empire. Came back two hours later and found it had been over two hours.
I have to ask, if an armchair warrior can call it, was Them's security lacking?
It's an interesting point. If I wanted to carry out some terror related beastliness in the UK I would be sure to join ARRSE and look at 'Flightradar' so I'd know exactly when to expect the door to be kicked in.