Lewisham
Lewisham is an area of southeast London, England, six miles south of Charing Cross. It is the principal area of the London Borough of Lewisham, and was within the historic county of Kent until 1889. It is identified in the London Plan as one of 35 major centres in Greater London, with a large shopping centre and street market. Lewisham had a population of 60,573 in 2011.

Lewisham is an area of southeast London, England, six miles south of Charing Cross. It is the principal area of the London Borough of Lewisham, and was within the historic county of Kent until 1889. It is identified in the London Plan as one of 35 major centres in Greater London, with a large shopping centre and street market. Lewisham had a population of 60,573 in 2011.
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