Help! On Friday morning I spotted Gavin, an old friend, on the tube. He told me that Paul, my best friend back in South Africa, was coming to London on Sunday [yesterday]. I told Gavin I'd email him for more details. But it turns out I don't have his email address in my address book, and nor have I kept any of our old emails.

Now, I know Gavin works for a posh department store. I remember it has a fancy double-barrelled name. I think it's somewhere off Bond Street or Savile Row. But I can't for the life of me remember what it's called. Can you?