His eyes will no doubt be firmly trained on the west of London soon, when the Mayor will take up the campaign to become the elected Member of Parliament for Uxbridge. But this morning Boris Johnson was embedded in the east of the capital, Greenwich to be precise, to announce plans to fire up an old, early 1900s power station and turn it into a power producer of the modern era, or as he put it "a great cathedral of power that has remained empty for generations and we're now going to bring back power to this building."
At the moment it operates merely as a kind of back-up generator for the tube, a failsafe should the National Grid suffer a power cut. But if the Mayor gets his way, and he often does, six brand new low carbon gas engines will fill the old turbine hall - with the capacity to generate enough power by 2025 to sustain 39,000 homes or 13 per cent of the tube network's annual requirement.
The by-product of power generation is heat - and that will also be harnessed and used in local homes.