The UK government is set to publish a hardline bill on Wednesday that will seek to intentionally remove parts of the withdrawal agreement signed in January. He added that the "Northern Ireland protocol is agreed" and "part of the withdrawal agreement".
Mr Barnier said he would be seeking clarification about the UK's plans, telling French radio that honouring the WA was "a pre-condition for confidence between us because everything that has been signed in the past must be respected".
The second scenario, which came into play since February, centres on potential failure to agree a trade deal which would be at the core of the EU-UK future relationship, if this can be brokered.
"Yes, the latest developments definitely increased the chance of a no-deal Brexit, but still no deal is not our base case", he said, giving a 50 per cent to 60 per cent probability to a deal. That's not how you deal with negotiating partners. Now he's said it.More news: Jordan Thompson & Alex de Minaur: Sydneysiders Making History At The US Open
When these British threats succeed (on this hopeful reading), and the EU gives way on fisheries and the "level playing field" and a historic UK-EU free-trade agreement is concluded, all concerned will be so relieved that a no-deal Brexit has been avoided that the prime minister will be regarded as the greatest British statesman since Palmerston.
"This is a prerequisite, a precondition for the negotiations on the future partnership, I think that's clear".
"We are not going to accept level playing field provisions that lock us in to the way the European Union do things", he said. "We'll have to wait and see".
"As a government we are preparing, at our borders and at our ports, to be ready for it", he will say.
While critics claim the unilateral move risks breaching commitments the United Kingdom signed up to, No 10 insists the changes are needed to end legal confusion and provide certainty for businesses in the event of no deal.
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Squaring the circle on paper was the easy bit: it remains unclear what checks will be needed, and how they should be administered, on goods arriving in Northern Ireland from Britain.
"However, as a responsible government, we can not allow the peace process or the UK's internal market to inadvertently be compromised".
Johnson did not rule out a deal altogether and vowed to work hard this month to achieve one.
As political leaders representing the majority of citizens who voted to reject Brexit, we have strongly represented the case that our peace, stability and economy can not be jeopardised and, in particular, that any harm caused to the Good Friday Agreement, in all of its parts, would be profoundly reckless.
True, there are elements in Boris Johnson's government including chief of staff Dominic Cummings who do genuinely care about making sure ministers can subsidise British business without any legal restrictions-but that is unusual in itself, given that Cummings wrote in 2015 that the "vast majority" of state aid issues in government are mere bogeymen, "easily dealt with if you have a sensible process and reasonable goals".More news: When Is ‘No Time To Die’ Coming To Theatres