Shadow minister Stephen Doughty has resigned from Jeremy Corbyn's frontbench live on TV.
The shadow foreign minister said he was quitting because of the way the Labour leader had sacked his colleague Pat McFadden as shadow Europe minister and had “looked at his own conscience” and decided to step down.
It follows two other resignations from shadow ministers in response to Mr Corbyn's reshuffle.
Kevan Jones resigned as a shadow defence minister, saying he could no longer serve in the Shadow Cabinet after Mr Corbyn replaced pro-Trident Maria Eagle with anti-Trident Emily Thornberry as Shadow Defence Secretary.
Jonathan Reynolds was the first shadow minister to resign this morning. He quit as shadow railways minister because he could no longer support the leadership after Mr McFadden was sacked for criticising the leader's reaction to the Paris attacks.
Mr McFadden said Mr Corbyn had told him his "disloyalty" included a comment in Parliament where he condemned people who viewed terrorist acts as "always being a response or a reaction to what we in the West do".
In pictures: Jeremy Corbyn reshuffle
In pictures: Jeremy Corbyn reshuffle
1/11 Jonathan Reynolds,Shadow Railways Minister: RESIGNED
He resigned as shadow railways minister in protest at the reasons for sacking Pat McFadden
2/11 Kevan Jones, Shadow Defence Minister: RESIGNED
He resigned as a shadow defence minister who strongly supports renewal of Trident. Has spoken out against Jeremy Corbyn’s leadership before and was also the centre of a row with Ken Livingstone after he said Jones “might need some psychiatric help” (Jones has previously spoken about his struggle with depression)
3/11 Stephen Doughty, Shadow Foreign Minister: RESIGNED
He quit as a shadow foreign minister in protest at the sacking of his colleague Pat McFadden as shadow Europe minister. He said he had “looked at his own conscience” and decided to step down
4/11 Pat McFadden, Shadow Europe Minister: SACKED
He was sacked as shadow Europe minister for "disloyalty" to leader Jeremy Corbyn
5/11 Pat Glass, Shadow Europe Minister: SAFE
Former junior shadow education minister Pat Glass replaced Pat McFadden as shadow Europe minister
6/11 Emily Thornberry, Shadow Defence Secretary: SAFE
She was promoted to shadow defence secretary. She is anti-Trident and therefore more in tune with Corbyn’s stance and replaces Maria Eagle, who was pro-Trident
7/11 Emma Lewell-Buck, Shadow Minister for Devolution and Local Government: SAFE
Emma Lewell-Buck was promoted to shadow minister for devolution and local government
8/11 Michael Dugher, Shadow Culture Secretary: SACKED
Outspoken critic of Jeremy Corbyn’s leadership, has been sacked as shadow culture secretary for his "incompetence and disloyalty"
9/11 Hilary Benn, Shadow Foreign Secretary: SAFE
Hilary Benn remains as shadow foreign secretary, but Corbyn’s team has insisted his role now comes with ‘new conditions’ that he must agree with Corbyn over foreign policy. Benn insists there are no ‘new conditions’ attached to his job and insisted: "I haven't been muzzled. I'm going to be carrying on doing my job exactly as before”
10/11 Maria Eagle, Shadow Culture Secretary: SAFE
Maria Eagle, moved from shadow defence to shadow culture secretary as part of Corbyn’s move to make his defence team match his anti-Trident views
11/11 Andy Burnham, Shadow Home Secretary: SAFE
Reports linked him to foreign secretary brief, but Corbyn appears to have backed down on sacking Hilary Benn. He does not see eye-to-eye with Corbyn on home affairs such as the Snooper’s charter, but removing your shadow home secretary so soon after starting would have been a dangerous move by Corbyn
Mr Jones later accused Mr Corbyn of opening up a north-south divide in his Shadow Cabinet by sacking northern MPs while promoting London-based MPs, such as Ms Thornberry, whose constituency borders Mr Corbyn's.
"The idea that our defence policy is being controlled by the north London part will be looked on with dismay by large parts of the country," Mr Jones said.
He also accused the Labour leadership of "turning the party into a protest party and a talking shop".
"I'm sorry but I'm not in politics for that - I'm here to make changes," Mr Jones added.
Mr Corbyn avoided a spate of Shadow Cabinet resignations, however, after he saved Shadow Foreign Secretary Hilary Benn from the sack.
Reports suggested that up to 10 Shadow Cabinet ministers would have quit in protest had Mr Benn been removed.
But Shadow Chancellor John McDonnell said Mr Corbyn will now have ultimate say on Labour's foreign policy and Mr Benn will have to talk from the back benches if he disagrees with the leader in future.
But speaking to reporters outside his home this morning, Mr Benn denied there were new conditions attached to his job as Shadow Foreign Secretary.
"I haven't been muzzled," Mr Benn said. "I'm going to be carrying on doing my job exactly as before, which is speaking for Labour on foreign policy, supporting Jeremy Corbyn and campaigning really hard to get Labour elected at the next general election."Reuse content