The Hanse in London

The Hanse operated the so-called Stalhof (the Steelyard) in London in the 15th and 16th century.
In addition to the information on Wikipedia, linked above, there is also a talk on Project Gutenberg, by Reinhold Pauli, on the Hansische Stahlhof in London, held in Bonn on March 11th, 1856, but published in a newspaper in Bremen.