When shopping in London, opt for the big guys: Selfridges, Fortnum and Mason, Top Shop and Liberty. These mega-stores feature floors of designers new and old; high-end home goods; vintage clothes; in-store tea rooms, bars and restaurants; and more. The stores are clustered around Covent Garden, Oxford Circus and Piccadilly Circus, so a good jumping-off point is Top Shop on Oxford. Then work your way through all the "high street" stores towards Selfridge's near Bond Street.
