Dorset Street was situated at the heart of the Spitalfields rookery in the East End of London. It should not be confused with the road of the same name in Marylebone, in London's West End. By repute it was "the worst street in London" and was the scene of the brutal murder of Mary Jane Kelly by Jack the Ripper on 9 November 1888.
The road was renamed Duval Street in 1904, before having its north side demolished in 1920 during the rebuilding of Old Spitalfields Market, and the buildings on the south side replaced by a car park in the 1960s. The site was built over during redevelopment of the Fruit and Wool Exchange in the 2010s.
More information on the Wikipedia page