Thinking about it I'm sure it was Kelly's up the Roman, are you sure about the West Ham bit.
No chewy liver here, cut the big old tubes out of it, if you want to stop it pen and inking soak it in milk for an hour or two
Kelly's is in Bow isn't it. I got mixed up, because many years ago I went there a few times with a girlfriend who lived near West Ham. They are not too far apart.
I was looking at a Gordon Ramsey recipe for cooking liver for pate and he uses the soaking in milk trick to take away the bitterness etc.