Harrods is very expensive, but used way more by foreign tourists than Brits.

Harvey Nick's, as S2C says, is a better equivalent, or chains like Jaeger. But would a man even know that much?

Incidentally, our shops (not stores) have discount or, more usually "Reduced" areas, not racks. And they are often full of crap. There are small upmarket chains that cater to the demographic - Hobbs, Jaeger, Country Casuals, for example.