look at this photo :
is that running over britain ? no not at the moment it isnt.
so why are all the flights in at least the southern half of the country grounded ? in reality flights could be going quite safely.
certainly there lots of private prop craft delivering rich people about the place under and outside the controlled air space which is closed.
when the cloud is directly over the country, flying in or under might have some level of danger, but where do you think the aerial shots of the volcano itself are coming from ? theyre taken from a plane or a helicopter ! right next to the volcano !
safety concerns can go too far.
Well at least theres less airborne immigration coming in, theyre always a silver lining. and fuck it, i dont go on holidays or fly about too much, so nothing to lose there.