I'm going to start stocking up on winter wear in the hope of keeping my heating bills down, and keeping warmer on the days I'm working in the office.
These are the only two thermal brands I really know of, so wondering which is best? I've seen a lot of postered recommend Uniqlo on here for other things. But I can access 20% discount in M&S.
Of course, if anyone can recommend anything else, I'm all ears.