After another turbulent week at Westminster, epitomised by Tories screaming abuse at one another as if on opposite sides of the house, Brexit is once again in a state of limbo.

Even though agreed by Cabinet, the Chequers white paper was essentially dead on arrival. No deal is better than a bad deal, Theresa May famously said. About the only thing everyone agrees on is that Chequers is very bad indeed; so bad in fact, that Brussels would be biting the Prime Minister’s hand off to accept it if negotiators thought there was any possibility of it being the final negotiating position.

Brexit has become like one of those obscure theological debates, where seemingly trivial doctrinal differences that few outside the priesthood fully comprehend manage to incite extreme passions and seething anger. There is not just the overarching schism between Leave and Remain, but schisms within schisms, and heresies so arcane that even their advocates struggle to define them.