just don't mention the war

My dad and I were in London one day, I think we'd been to a museum, I was about 9, maybe 10. We decided to get a cab to a restaurant because I didn't like the confined trains. So as we hail a cab, another gentleman about 4 feet away from us does the same. I turn to my dad and say "Look, it's the man from Fawlty Towers", low and behold, it was John Cleese in the flesh. He was very courteous and insisted that we take the taxi. I also told him that I was a big fan of Fawlty Towers, despite it being made some 20 years before I was born to which he replied "just don't mention the war".