Sorry not the London, but I had an uncle who was a Boy/Ord Seaman on a ship that was involved in/after the Yangzte Incident, possibly whilst en route home from the Far East. My uncle has since passed and no one remembers the name of his ship. Can you think of any other RN ships that were in the area around that time? It wasn't the Amethyst, Consort, London or Black Swan but I'm pretty sure I'd remember the name if I heard it. It was all before my time - I served 62-73.