Interesting looking at flightradar24.com - Not a single civil movement
over the UK and a lot of western Europe . . . .

www.flightradar24.com

I don't really understand why this is such a big deal though.

Presumably the ash cloud is not 'that' dense otherwise we would have a
blackout.

Why then is it so important that aircraft avoid what seems to be a
little bit of fine dust?

I understand that the plane can suffer engine failures etc if it goes
through dense cloud of volcanic ash but is that likely to happen at such
limited concentrations?

And will I have to clean the car again once it's all fallen out of the
sky!!??