Deputy Labour leader Tom Watson warned the party could “cease to exist as an electoral force” if the plotters were successful, in an angry Twitter exchange with Jon Lansman, the founder of the pro-Corbyn organisation Momentum.
Watson warned Lansman: "You have revealed your plan. If you succeed you will destroy the Labour Party as an electoral force. So you have to be stopped."
Lansman replied: "For 20 years the left was denied a voice. We will deny a voice to no-one. We face big challenges & we need our mass membership to win again."
The plot will alarm Labour moderates who have been hoping to drag the party back towards the centre ground when Corbyn eventually goes.