London is great with its street style. It offers amazing not only high end boutiques, but small local designer ones, vintage or cutting edge London one. I like to stroll around markets whenever I have time, especially love Brick Lane. Even though I won't be buying anything necessarily, the atmosphere, the vibe and those cute cafes are good enough to make a perfect Sunday here. Nearby Brick Lane you got Spitafield market, Petticot Lane or Columbia road. If you are not into vintage stuff and these kind of markets, there are variety of shops and boutiques around, make sure you'll go to Boxpark, All Saints or Urban Outfitters around.
Have you ever visited markets here in London?

Photos by Serosa