It's just a block away from Harrods, but it's not competing on the same turf, because its passion is fashion, all the way. There are nearly six floors of it, including departments for dressing homes and men, but the woman who invests in her wardrobe is the main target. Harvey Nicks is strong on accessories, especially jewelry, handbags, scarves, and makeup. The fourth floor has a chic home-design department, stocking such names as Nina Campbell, Mulberry, Ralph Lauren, and Designers Guild. A reservation at the Fifth Floor restaurant is coveted. Tube: Knightsbridge.