This will of course be most welcome news for all those experts who say that the airspace should never have been shut. Standby for the pious glee of those who never will be in a position to have to make such decisions but nevertheless try to talk as if they knew the answer all along.
In the absence of meteorological changes to the weather forecast altering the decision to keep UK airspace shut again tonight, why wouldn't people come to the conclusion that this has been a ridiculous overreaction now they've changed their minds?