Bojo is like a stealth-bomber compared to Cameron's Gypsy-Moth (WW1 biplane).
Cameron came back from Europe, Chamberlain-like, clutching a list of promises declaring 'Peace in our time', just on this occasion: 'Concessions in our time'. How Merkel etc must be laughing, because Cameron got little or nothing of any consequence at all, but Cameron has to do Merkel's job by pretending that he has. But that is the EU, 'there is no reverse gear', it is and always has been an onward march to 'Ever closer union'.
Cameron is a euro-phile who pretends to be a euro-sceptic, in order to keep his voters on-board and keep UKIP at bay. Cameron must be cacking himself, he's just about run out of track. And Bojo and Cameron go way back [https://iconicphotos.wordpress.com/2010 ... gdon-club/
top pic, id'd as nos. 2 and 8], so Bojo knows his target just about as well as one might. For an outside bet, it's not beyond possibility that Bojo will use this to engineer Cameron out of no10...
p.s. I'd discount talk of a Brexit, IMO that's an initial hard negotiating position. One that has to be adopted to have any hope of achieving any meaningful concessions.