Not even a week has gone by when, last Friday, a handful of hours were enough to send a rush of adrenaline to British politics. The resignation of Economy Minister shadow Alan Johnson, the appearance of Tony Blair in front of the jury of the Committee of Inquiry into the Iraq war, Andy Coulson and the Adda from the role of communications director of the Prime Minister David Cameron, are three facts that deserve attention, both considered separately and in their causal chain at all chronological.