You could question the wisdom of David Davis’ resignation, but there is no doubt, given his continuing support for the PM, that it was a principled, very British kind of act. Given Bo Jo’s history of rank opportunism, however, his resignation should be viewed as an attempt to bring down a crumbling government and create a path to power for himself.
Will it work? The one area in which Theresa May excels is in keeping power, so don’t bet the ranch on it.