A second member of Jeremy Corbyn’s shadow cabinet has suggested he could be forced to resign if the party backs 'Brexit'.

Shadow Scottish Secretary Ian Murray said he “could not envisage” Labour arguing to leave the European Union.

But, he added: “I don’t think I would be able to support a position to take the UK out of the EU”.

Earlier this week Lord Falconer, the shadow justice secretary and Tony Blair's former flatmate, threatened to quit the frontbench if the party campaigned against EU membership.

"If the Labour Party adopts a position which says we might leave the EU and might argue against (staying), then of course my position would become impossible," he said.

Within hours Labour had released a statement from the shadow foreign secretary Hilary Benn saying that the party had always been committed to "not walking away" from Europe.

Earlier this week Mr Corbyn told Labour MPs that support for staying in the EU was not unconditional.

He said he would not write David Cameron a "blank cheque" in his ongoing negotiations with other European leaders.

The Prime MInister has pledged to win significant concession from Brussels before an In/ Out referendum in 2017.

Mr Murray said: "Jeremy has made at pretty clear that he wants Britain to stay in the EU.

"But it is not unconditional."

Asked if that meant Labour could back Brexit he said: “I can’t envisage that ever being a possibility in the Labour party...

“We will have to see what the package says.

"But at this stage I cannot see a set of circumstances that would mean that the Labour party would be campaigning for Brexit.

"It is just not in the interests of the UK. Even with the current European settlement that we have.”

He added: “Lord Falconer has already said quite clearly that he could not see it happening and he would not be able to support it”.

Asked if that meant he too would resign if the party supported Brexit, Scotland's only Labour MP said: “I don’t think I would be able to support a position to take the UK out of the EU.”

Mr Murray also appealed for Mr Corbyn to be given more time as party leader, as he described the past few days as a “whirlwind”.

He also defended the veteran left-winger's decision not to sing the national anthem at a service to commemorate the Battle of Britain.

He said: "I think he should have taken the decision to sing the national anthem.

"But do I fully respect the decision?

"Jeremy Corbyn‘s biggest strength is his principles and his principles are not to sing the national anthem but to stand in respectful silence."

He added: "I don’t think anything he did was disrespectful."

On the furore that surrounded Mr Corbyn's decision, Mr Murray said he "would rather" the headlines were about the Conservatives "disgraceful" tax credit cuts.

He added: "I think that Jeremy needs to do an awful lot of thinking about how he gets the front pages to change to the big issues and not deflect away from what this Tory government have done to the country.

"And I think he has a real opportunity to do that.

"But I think him and his team need to be given a chance. “