Odd that this hasn't been mentioned on the forum (until now, that is).
Eyjafjallajokull kind of rolls off the tongue, does it not?

Health risks? Probably no worse than living in London or any other large city*, I should imagine. Especially if you're lucky enough to live near a main road.
But what about "out there" Neil ... is Saudia still flying domestically? I should imagine so. I always enjoyed those internal flights. I used to try to get a window seat so as to admire not only the vastness of the desert below, and the occasional herd of camels, the (what appeared to be) shanty towns (but may have been animal pens) on the edges of the larger towns, and but also the acres of junked vehicles, Caterpillar tractors (and all the rest) plus the palls of black smoke from stacks of burning tyres
etc.But what's this I hear about a
Nuclear City? The mind does indeed, er .... boggle!
Meanwhile, I'm enjoying the clear (clear of aircraft, that is) blue skies over England whilst they last!
*
Or even Al-Hasa when they are burning the dead foliage from the date palms.