Just to close off the story from a couple of weeks ago... as you'll almost certainly know already, Boris Johnson won the London mayoral election. And as pledged, he has now returned to tweeting as @MayorOfLondon - an account which, we have now confirmed, belongs to the Office of Mayor, and not Boris personally.

I'm putting jobs & economic growth at the heart of my mayoralty for a more successful & prosperous city bit.ly/IAwmrg

— Boris Johnson (@MayorofLondon) May 8, 2012