Christian McArdle wrote:

I don't think so, but I think it would be an excellent idea. Single
stat
thermostats are so dangerous, it scares me.

Yes, agree.

I'm curious as to whether it might be someone selling old (and
worthless) stock to unwary punters. I think the revised regulations
allowed a 'grace period' for stockists to shift the old-type non-reset
single-stat thermostates. I don't recall when that expired.