Greenwich
Greenwich is an affluent area in south-east London, England, within the Royal Borough of Greenwich and the ceremonial county of Greater London, 5.5 miles (8.9 km) east-south-east of Charing Cross. It contains the UNESCO World Heritage Site of Maritime Greenwich.

Greenwich is an affluent area in south-east London, England, within the Royal Borough of Greenwich and the ceremonial county of Greater London, 5.5 miles (8.9 km) east-south-east of Charing Cross. It contains the UNESCO World Heritage Site of Maritime Greenwich.
Check the official site before travelling; hours and prices can change.
More markets

Borough Market
London's defining food market — go early Saturday, eat your way around the perimeter.

Columbia Road Flower Market
Sunday-only flower market in the East End — 8 a.m. for choice, 2 p.m. for prices.

Maltby Street Market
Borough's smaller, scruffier sibling — railway arches, weekend only.
Source: wiki-list