The famous Portobello Market takes place alongside the whole length of Portobello Road in Notting Hill. Various goods are being sold here (such as clothes, snacks or antiques). The area is also known for its annual Portobello Film Festival.
If you want to check out the goods and shop in not that crowded environment, make sure to visit the market as early as possible. Its organisers recommend to come before 11:30 am, as the market gets very busy after this time.