Jo Johnson’s resignation exposes a fundamental truth: this government is broken. The divisions in the Conservative Party run deep. The three-decade long argument about Europe isn’t over. And the government is in a state of permanent paralysis over the biggest task facing this country in a generation.

No 10 will tell us that a breakthrough is just around the corner. But that’s delusion, not reality. There is no hiding the fact that this government is incapable of negotiating the right Brexit deal for this country.

Sooner or later, parliament will have to decide whether to approve the Brexit deal the prime minister has negotiated with the EU (assuming she has been able to reach an agreement). She will, of course, insist that even if the