Actual Data
as far as I can see almost all the definition of the closed area is being done using computer models - hardly any real data is actually being collected
When its clear blue sky it's a bit hard to see what real problems that would be caused by allowing flights in certain directions at specific altitudes and then maybe clearing to higher altitudes when west of Ireland and south of France
I have a feeling if there wasn't an election campaign in the UK someone would have acted already to restrict the panic..............