Grimly Curmudgeon gurgled happily,
sounding much like they were saying:

I said a few days ago - there is no law against snow chains

There is if they may damage the road surface - which they can and will
on tarmac.

Which is the same as the general prohibition against damaging it with
tracked vehicles, etc, isn't it?

Yup.

Are snow chains mentioned specifically?

Not AFAIK, nor are studded tyres.