That really is MI6 headquarters. I walked along the Thames embankment one day and took the picture from across the river. At the time you could walk on the embankment in front of Bond's home, but I bet you can't do that any more.
From today, I'm going to a twice weekly updating schedule. This is to give me some more time to finish the story and art without interrupting publication (any more than going from three to two updates a week, anyway.)