Brexiteers have been urged not to be “purist” about changes the Government is seeking to the Northern Ireland backstop as the Prime Minister is set to tell MPs to “hold their nerve”.

Ahead of Theresa May’s address to the Commons, prominent Leave-supporting Cabinet minister Andrea Leadsom indicated any revisions to the backstop proposals may not appear in the Withdrawal Agreement.

Commons Leader Mrs Leadsom told BBC Radio 4’s Today programme: “The point is to ensure that the UK cannot be held in a backstop permanently.

“How it’s achieved is not something to be purist about.”

Many leading Brexit supporters have said changes to the backstop, which would see the UK obeying EU customs rules after a transition period if no wider trade deal had been struck, should be laid out in a renegotiated Withdrawal Agreement.

Pressed on whether the so-called “meaningful vote” in the Commons on the Government’s Brexit deal might be delayed until after an EU summit on March 21, Mrs Leadsom said: “The Prime Minister is seeking to bring back the meaningful vote just as soon as possible.

“So it is a negotiation. It’s not possible to predict the future.

“But the meaningful vote will come back to Parliament as soon as the issue around the backstop has been sorted out.”

Mrs May told Cabinet on Tuesday morning that discussions with the EU on her proposals to change the backstop “will need a little more time to conclude”.

She confirmed that the Brexit debate scheduled in the Commons for Thursday will be followed by a further opportunity for MPs to vote on amendments on February 27, if no deal has been reached by then.

In the meantime, she said the Government would “continue to progress the work on workers’ rights, the role of Parliament in the next phase of the negotiations and support for communities that feel they have been left behind”, said Downing Street.

Mrs Leadsom insisted the Government was not trying to run down the clock ahead of the UK’s scheduled EU withdrawal date of March 29.

The Prime Minister is expected to issue a rallying call for MPs to “hold our nerve” as her battle to secure a Brexit deal backed by Parliament reaches a crucial stage.

Countdown to leaving the EU
(PA Graphics)

Mrs May is due to update the Commons later on the latest developments in negotiations with Brussels and Dublin, as the sides try to find a way through the impasse on measures for the Irish border.

Downing Street said Mrs May’s statement, which comes a day earlier than expected, will give MPs more time to “digest the content” ahead of a series of expected Commons votes on Thursday.

Mrs May is expected to say: “The talks are at a crucial stage. We now all need to hold our nerve to get the changes this House has required and deliver Brexit on time.

“By getting the changes we need to the backstop, by protecting and enhancing workers’ rights and environmental protections, and by enhancing the role of Parliament in the next phase of negotiations, I believe we can reach a deal that this House can support.”

Mrs May’s Commons appearance comes as business continues to express concern about the prospect of a no-deal exit from the EU.

Food and Drink Federation chief executive Ian Wright told the BBC: “This is the biggest threat that our members and businesses have faced since 1939.

“Many businesses are threatened with extinction.

“A no-deal Brexit would lead to considerable concerns for one in 10 of our businesses.”

Talks are continuing between the UK and EU, with Brexit Secretary Steve Barclay and Mrs May’s de facto deputy David Lidington meeting MEPs in Strasbourg on Tuesday.

Mr Barclay was said to have held “constructive” talks on Monday night with the EU’s chief negotiator Michel Barnier in Brussels.

The pair agreed to further meetings in the coming days, while their teams will continue to work to find a way forward.

Meanwhile, Sky News reported the former president of the European Council, Herman Van Rompuy, had dinner with Mr Lidington in Brussels on Monday night.

Mr Van Rompuy has been tipped as a potential “influencer” to break the Brexit deadlock, the broadcaster reported.

Negotiations of a kind have also been taking place back in Westminster, with an exchange of letters between Mrs May and Labour leader Jeremy Corbyn.

However, Mrs Leadsom insisted there is “no chance” of Mrs May accepting Labour’s vision for leaving the EU, despite speculation she could soften her stance on customs union membership.

Mrs Leadsom dismissed the prospect of Mrs May adopting Mr Corbyn’s “world view”.

The Commons Leader said she would stay in the Cabinet to help Mrs May deliver Brexit and denied that the PM was softening her stance over a customs union in a letter to Mr Corbyn.

Mrs May’s reply sparked concern among Conservative Brexiteers that the Prime Minister could concede too much ground to Labour in an attempt to win cross-party backing for a deal with Brussels.

Mrs Leadsom told the Press Association: “I think she’s making quite clear that what Corbyn is demanding is actually not as good as what the Prime Minister’s deal is offering.

“So he wants a customs union and he is unclear as to whether that means he also wants an independent trade policy.

“He’s unclear as to whether he also wants to stop free movement, and of course the EU’s view would be, ‘Well, if you’re in the customs union then you have free movement and you abide by the common external tariff’.

“I think there’s no doubt that what the Prime Minister is offering is better than what Corbyn is demanding, which simply begs the question, if they like it, why don’t they vote for it?”

Public opinion of government’s Brexit negotiations
(PA Graphics)

Mrs Leadsom said there was “no chance” Mrs May would adopt Mr Corbyn’s “view of the world”, adding: “The Prime Minister has been absolutely clear we’re leaving the EU, we’re leaving the customs union, we’re leaving the single market.”

The frontbencher refused to say what the cut-off date would be for the necessary legislation to get through the Commons to allow the UK to leave the EU as planned on March 29.

She said it was possible to pass Bills “quite quickly” with “goodwill” from the Commons and Lords, but added: “It’s just not possible to say how quickly it could be done.”