03:43

More than half of the Labour shadow cabinet is expected to stand down on Sunday in a major coup against Jeremy Corbyn, triggered by the result of the EU referendum and the leader’s decision to sack Hilary Benn.

The decision of Heidi Alexander, the shadow health secretary, to resign on Sunday morning is seen as hugely significant, because unlike Benn she was a more “loyal and pragmatic” member of the Corbyn team, a Labour source said:

She is seen as a moderate, practical and pragmatic voice. Hilary always had a problem with Jeremy. Now that Heidi’s gone, most of the shadow cabinet will step down. He can’t just replace those positions because other front bench ministers won’t step up to the roles.

Loyal members of shadow cabinet told the Guardian they were now writing their resignation letters in a coup that will be impossible for Corbyn to contain

