Ronaldsway (IOM) "closed their airspace" last time...
The last time this happened, Ronaldsway ATC (EGNS) "closed their airspace". That meant nothing could fly within their airspace (VFR, IFR, no-FR-whatsoever...). I know because I'm based here. Couldn't even book-out....
Crazy -- because the satellite images of the ash cloud -- at the peak of it's impact over UK --revealed it to be many, many miles away from EGNS airspace. Skies were blue...couldn't wait to go flying....No chance.
So, good luck
Fly Meister
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....Google iNavCalc and iMetBrief if you haven't already done so (will make your flying life easier)