Volcanic ash and ATC
I pilot I spoke to this morning en route to Popham in uncontrolled airspace and clear unlimited vis, was told by Farnborough ATC that he should not be flying as a No Fly Zone was in force!!
He was flying a Piper Cub!!
If there are no Notams in force-there wern't, then that is not in their power to stop flying in the open FIR.
The Piper of course continued on its way.