Portobello Road

The world famous Portobello Road antiques and flea market in Notting Hill takes place every Saturday from 8:00-6:00 although there are some stalls on a weekday, as well. 
On Saturday, it's manic, with over 1,000 stalls, selling everything from books to bric-a-brac and lace to porcelain - even fashion and some food stalls. 
(This is the place to shop-and-eat and then shop some more.) 
The market runs from Chepstow Villas to just under the Westway close by the A4 flyover.

Nearest Tubes: Notting Hill Gate or Ladbroke Grove.