If I had my insurance company round insisting that all the Artex was
removed at their expense, I'd celebrate for a week.

So call your insurance company, ask to speak to an actuary and ask if
they have heard of mesothelioma. Go from there.

I should have rephrased it as "if I was still in my last house and I had
my..."

My current house has no Artex at all. It just has lath and plaster ceilings
with loads of cracks, instead. No chance of getting them to replace those
with plasterboard, either!

Christian.