Yet again, Boris takes a swipe at Dave

Rivalrous mayor ridicules land-mark "Big Society" concept

It is by no means the first time. It isn't the most serious example. And it won't be the last. But yet again, Boris Johnson, the London mayor who sees himself as a rival to David Cameron, has had a little dig at the Tory leadership's national agenda.

Arriving for the launch of his cycling super-highways -- you may have seen, or smelt, the big blue sections being painted onto the capital's roads at present -- the self-appointed...