I wish I would have known...
so many unique markets
The big markets as Spitalfields, Camden or Portobello road are perfect place to spend a whole day walking through the stand looking for good business. Go at the Greenwich Market to find gifts and creator articles. You can also find street food within those markets.
As a passionate girl for the clothes, shoes, and accessories I looking for the best market to buy those things at London. When I go in the foreign country, I Like buy a sweet or t-shirt with the name of the city.
Camden is the big place with a lot of clothes market, you have to negociate with the seller to have a good price. At Camden there are a lot of vintage shops selling clothes, but also accessories like vinyl, shoes.
Brick Lane is also a perfect place with a big market open all Sundays. This market attracts a lot of londoniens who looking for secondhand pieces. There are not only clothes, you can also find old magasines or art deco furniture.
Blitz and Rokit are 2 vintage shops, and two of the most famous in London. Blitz is located at Shoreditch and Rokit has 4 shops in London, 2 at Brick Lane, 1 at Camden and 1 at Covent Garden.
Portabello road is a very big market, the largest antiques market. Within this market you can find Antiques, Arcades, Bric-a-Brac, Fashion & Clothing, Fruit & Veg and food. The things that you can find depend on the day that you coming, for example, the Sundays you can find everytings but from Mondays to Thursdays you can't find Antiques and Arcades.