In 1909, the government bought all the major docks along the Thames, and the new Port of London Authority (PLA) assumed control on 31 March 1909. The PLA created five dock groups, the West India, East India and Millwall Docks forming one of them, known as the India and Millwall Docks.
At that time, the West India and Millwall Docks had no direct water connection with each other.
Various plans were proposed, but these were all interruped by World War I.
In 1929, work was completed on passages connecting all three West India docks, and connecting West India Docks with Millwall Docks (known as the Millwall Cutting).
The new passages are all visible in the following aerial photo:
In 1934, McDougalls built their iconic flour silo building, with its 10 cylindrical, concrete silos.
In 1933, the PLA held its annual swimming gala in the newly-opened Millwall Cutting.
Ominously, the German team gave a nazi salute during the playing of the German national anthem.
A few years later, their compatriots would return to the Millwall Docks, intent on destroying them.