Ooh, good to know about Sloane and Royal Exchange!
Can't wait to go shopping in London in a few months, so excited!
Sloane is right around the corner from Harrods and is a lovely boutique. I recommend going to Royal Exchange on a weekday morning or afternoon- it's in an area that's mostly offices (though there's a small shopping center now) so it's not terribly busy during work hours. It's conveniently just outside the tube stop too!