The Labour Party has been through bad times before, but the leadership of Jeremy Corbyn has become a nightmare with no end in sight. Momentum, the grassroots organisation, is his chosen vehicle to perpetuate far-left control of the party. It has just abandoned its commitment to non-violence. This does not bode well for the party conference in Liverpool next month, when Momentum will be holding its own parallel event. Its diehard Corbynistas know how to purge and intimidate. Momentum has momentum.

No wonder Tory MPs report that their moderate Labour counterparts are begging for an early election to put them out of their misery. Better an end with horror than a horror without end, they reckon. But Mr Corbyn insists he will soldier on even