Labour leader Jeremy Corbyn is facing a growing revolt from senior politicians within his party in protest over his leadership in the European Union referendum.
Here, The Independent will be keeping a tally of who has resigned - so far.
Hilary Benn – shadow Foreign Secretary
Well, Hilary Benn didn’t exactly resign - he was fired. But his sacking has triggered a mass walkout from the frontbench.
Mr Benn, the son of the late Tony Benn who was one of Mr Corbyn’s mentors, said there was "widespread" worry among Labour MPs and in the shadow Cabinet over Mr Corbyn's ability to win a snap election in the wake of David Cameron's resignation.
The sacking followed claims in the Observer that Mr Benn called fellow MPs over the weekend to take soundings about a putsch. The party leader has faced accusations from his own MPs that he led a weak campaign in the EU referendum and is facing a motion of no confidence.
Heidi Alexander – shadow Health Secretary
Heidi Alexander, the Shadow Health Secretary, became the first to resign on Sunday morning following Mr Benn’s sacking. In an open letter, she wrote: “It is with a heavy heart that I am writing to you to resign from the shadow Cabinet”.
Ms Alexander added that there are "a fair number" of other senior Labour figures considering their positions.
Asked how many could join her in resigning, she told ITV's Peston on Sunday: "I think that there are a fair number of people who do feel similarly to me. “I know a lot of my colleagues will be asking themselves similar questions to the one I've asked myself this morning."
Lucy Powell – shadow Education Secretary
In her resignation to the Labour leader, the shadow Education Secretary wrote that she did not know Mr Corbyn before he became leader but “have come to know you and found you to be a decent, principled and kind colleague.” She also said that the party faced an "existential threat" and warned that it has lost the support of many of its traditional voters.
She added: “However, it is increasingly clear that your position is untenable and that you are unable to command the support of the shadow Cabinet, the Parliamentary Labour Party and, most importantly, the country.”
Seema Malhotra - shadow Chief Secretary to the Treasury
Ms Malhotra’s resignation is seen as significant as, unlike other rebels, she is believed to be loyal to the leadership, especially to John McDonnell. Just yesterday she introduced Mr Corbyn as he made his speech following the EU referendum vote.
But the MP for Feltham and Heston has joined a growing number of her frontbench colleagues in resigning.
Gloria de Piero - shadow minister for Young People and Voter Registration
According to The Guardian, she told Mr Corbyn in her resignation letter: "I do not believe you can deliver that victory at a general election, which may take place in a matter of months.
"I have been contacted by many of my members this weekend and it is clear that a good number of them share that view and have lost faith in your leadership."
Kerry McCarthy - shadow Environment Secretary
In her resignation letter, she said: "Although I do not doubt your personal commitment to your long-held principles, I believe that a new leader is needed to take on the challenges ahead: Steering our way through the very difficult period facing this country, exerting a decisive influence on the post-referendum negotiations, and winning broad-based electoral support."
She told Mr Corbyn: "The referendum result was a huge disappointment, and we now face the challenge of negotiating our future relationship with the rest of Europe. Vital protections won through our EU membership must not be jettisoned.
"This requires strong leadership from the Labour Party, and an alternative vision for government, which is seen as credible by the wider electorate. Although I do not doubt your personal commitment to your long-held principles, I believe that a new leader is needed to take on the challenges ahead."
Lilian Greenwood - shadow Transport Secretary
Shadow transport secretary Lilian Greenwood, MP for Nottingham South since 2010, was first promoted to the Labour frontbench by Ed Miliband and kept on by Mr Corbyn.
She echoed the concerns of many of her former front bench colleagues that Brexit will cause economic hardship and be accompanied by growing intolerance.
She said: "Faced with such challenges, it is essential that we have a strong and united opposition. You are a kind, decent and principled colleague, but in my view a new leadership is required to bridge the widening divides in our party, both in Parliament and in the country as a whole."
Ian Murray - shadow Scottish Secretary
Ian Murray, who is Labour's only MP in Scotland, resigned from the frontbench and told the BBC's Sunday Politics programme: "We've gone through an incredibly difficult time, not just in the party but since the EU referendum result on Friday morning...the Labour Party has to be a strong opposition and a broad coalition in order to get back into government."
He added: "He's [Mr Corbyn] a decent human being, a lovely man who I get on incredibly well with. But he just can't lead the Labour Party and I don't think the public think he can be Prime Minister."
