Senior Labour MPs have called for Jeremy Corbyn to resign as tensions within the party rise over whether Britain should join airstrikes on Syria.
It comes after the party leader told MPs in a letter that he could not support military intervention against the so-called Islamic State in the country, sparking a furious backlash from shadow cabinet members who had not yet agreed their position on the matter.
Speaking to BBC Radio 5 Live, former minister John Spellar said Mr Corbyn's behaviour over the vote had been "unacceptable".
It's absolutely right for him to put that view in the shadow cabinet. It's right for them to discuss it.
They thought they were going away to resume that discussion on Monday. He's now trying to pre-empt that and whip up a storm inside the party.
Certainly... they should not resign. They should hold on to those places. If anyone should resign after this incident, it should be Jeremy Corbyn.
Another former minister, Fiona Mactaggart, echoed his sentiments - despite saying she was not convinced by the case for bombing either. Speaking to BBC Radio Berkshire, she said:
[Corbyn] hasn't got a strategy to lead the party from where it is to where it needs to be and the people of the country can see that. I think it probably is unsustainable.
I think [quitting] would be a sensible strategy because I think that the division at the moment is causing real problems.
Protesters gathered outside Downing Street to urge MPs to vote down plans to bomb the war-torn country
Divisions within Labour appeared to grow over the question of airstrikes on Syria, as shadow chancellor John McDonnell backed a free vote.
A Labour source reveals the (un)pleasantries at the shadow front bench meeting, including a confrontation between two high-profile members.