After Cameron’s “back EU, or I sack you” ultimatum, who would actually walk?

Guido does not have much hope for Hammond, who – just like Hague – went pretty native the second he walked into the FCO.

Fallon owes his entire cabinet career to Cameron and really, really likes being Defence Secretary. Would he be willing to ‘stab the country in the back’ though?

More likely to cause trouble would be future leader contenders Sajid Javid and Boris. Though the Mayor of London’s true feelings about Europe could be described as ‘very confused’.

Grayling and Gove are well touted for their Euroscepticism, as is bone-to-the-right John Whittingdale, a former Maastricht absentee.

It’s often forgotten that former MEP Theresa Villiers is very sound on this issue. The former MEP loathes the place.

Most likely to go would the other former Maastricht agitator, IDS. Though what does he love more: Universal Credit or national sovereignty?

Tory unity lasted exactly one month.