British officials have told the European Commission they will accept all of Theresa May’s Brexit deal,except the Irish border backstop, ahead of a meeting between Boris Johnson and Jean-Claude Juncker on Monday.

The revelation, coming as David Frost meets EU officials for talks in Brussels today, has raised fears among Tory Brexiteers that Boris Johnson is preparing to foist a May 2.0 deal on the UK, despite Mr Johnson's insistence that the withdrawal agreement "is dead".

It means the British government is prepared to pay Brussels the £39 billion Brexit bill, if a solution to the backstop is found and the promise of a free trade deal made.

“This rebranded EU treaty is not Brexit,” Nigel Farage, the leader of the Brexit Party, said, “This is a sell out and will lead to years of acrimony with the EU.”

UK and EU sources confirmed that British negotiators are only discussing the backstop and the political declaration, which sets out the terms of future trade negotiations.

“We will say yes to citizens rights. We will say yes to the financial settlement,” a Whitehall source said.

“It is going to be May 2.0. But the current proposals for the backstop are not realistic,” an EU diplomat said.