He probably could, but when I lived in London I'd often see celebs taking the bus or the tube. Among many that I'd see were Christopher Biggins, Mark Wing-Davey, Henry Kelly, Windsor Davis, Tom Baker, and Roger McGough
I'm so sorry you had to be in the same vicinity as some of those people for however long or short a time it was.
Windsor Davis, Tom Baker and Roger McGough were quite pleasant to talk to. Henry Kelly was a bit of an annoying twat. I think he expected more people to recognise him.
Tom Baker is a real character. I once almost collided with him whilst out jogging. His bad, he walked out of a newsagents, opened his paper and stopped dead on the pavement oblivious of anyone else. He was also a regular in the local Tesco cafe for a while where he'd happily chat to anyone.