Jonathan Chan has uncovered rare photographs of the Chinese opium scene in East London. Here he describes the chain of events that spread opium around the world, before telling the story of Ah Sing, whose den was one of the best known in LondonHow Britain
John Seed's book Wonderful London looks at the supposed Chinese community in Limehouse.
Before the First World War there were never more than a few hundred Chinese people in London - and many of these were transitory sailors.
Why then did so many myths