It was a photo encounter of unspoken permission exchanged through the eye contact.
I simply smiled and pointed my camera at him while he kept swiveling on his chair. Every time I tried to shoot him, people came into the shot and blocked my view. Portobello Market is a busy place after all. You can't give up easily. His smirk, however, just kept on getting bigger. Then he started humming 'People don't want you to make my photo.' I got the shot and responded 'Oh but they do!' and walked away grinning.