BORIS Johnson will this week present Angela Merkel and Emmanuel Macron with an ultimatum - give Britain a new withdrawal agreement or see a no-deal outcome on October 31,

On a visit to Berlin on Wednesday and then Paris on Thursday - his first trips abroads as Prime Minister - he will repeat his insistence to the German Chancellor and French President that Britain will be leaving the European Union on Hallow'en; deal or no-deal. He will make clear MPs will not and cannot cancel the outcome of the EU referendum, stressing how Theresa May's Withdrawal Agreement with the EU was three times comprehensively rejected by MPs and is dead.

However, Number 10 said it expected there would be "very little discussion" of Brexit during the visits, predicting that each side would state its position and then move on to other topics.

Whitehall insiders believe the EU27 is biding its time, waiting to see if the UK Parliament can find a way to stop a no-deal Brexit. They believe once Brussels understands it cannot, then it will blink at the last moment.

It is thought the PM’s discussion with his German and French counterparts will mainly revolve around next weekend's G7 agenda, covering topics such as foreign policy, security, trade and the environment likely to dominate.

Mr Johnson will meet world leaders at the summit in Biarritz, France, where he will seek to spread the message of the UK's "renewed global reach".

He is also expected to discuss how states can work together to address challenges facing the world's biggest economies, such as fears about the financial system, security issues and climate change.

The gathering of world leaders is expected to be dominated – from a British perspective – by the Conservative leader’s meeting with Donald Trump since taking over as PM in July. The two leaders are expected to talk up the prospects for Brexit and in particular a US-UK trade deal.

Details of the PM's travel plans emerged as Jeremy Corbyn reiterated his call for MPs to work together to prevent a no-deal Brexit.

Mr Corbyn, who set out his plan to be installed as a caretaker prime minister last week to stop the UK crashing out of the EU without a deal, insisted his proposal was the "most democratic way" to prevent a no-deal.

He told the Observer: "My message to MPs across Parliament is simple and urgent: only by working together can we stop no-deal.

"Three years after the EU referendum, the country stands at a precipice. Boris Johnson has become Prime Minister without any popular mandate. He has no right to drive our country off a cliff and into the arms of Donald Trump with his no-deal fixation.

"The plan I set out this week is the simplest and most democratic way to stop no-deal. We have to seize the opportunity before it's too late, so the people, rather than an unelected Prime Minister, can decide our country's future."

The Liberal Democrats and senior Tories have rejected his proposal. However, it won the potential backing of the SNP, Plaid Cymru and Tory MP Guto Bebb.

In other developments:

*Mr Johnson accused Philip Hammond, the former Chancellor, of "gravely damaging" the national interest with his bids to frustrate Brexit. In a letter, the PM said it was "plain as a pikestaff" that the EU "will simply not compromise as long as they believe there is the faintest possibility that Parliament can block Brexit on 31 October".

*A Downing Street source accused Tory Remainers of "appalling dishonesty" for attempting to use the Brexit delay to "cancel the referendum".

*Stephen Barclay, the Brexit Secretary, has signed the "commencement order" that will trigger the end of the supremacy of EU law in the UK on October 31.