Poplar Dock

Poplar Dock is a small dock in east London. It connects to the Blackwall Basin of the West India Docks and, although independent of this system, has never had a direct connection to the Thames.

Originally a series of reservoirs built by the West India Dock Company and completed in 1828, Poplar Dock was converted into a railway dock, in the days before any of London's enclosed dock systems were connected to the railway network. The dock was built by the East & West India Docks and Birmingham Junction Railway Company and connected to the company's goods yard at Chalk Farm. It was alone among the docks to remain outside the control of the Port of London Authority in 1909, and remained in the ownership of British Rail until closure in 1981.

Source: Wikipedia