BRITAIN is set to leave the EU without a deal at all, Arlene Foster is said to believe.

Leaked emails say the DUP leader was left furious after “hostile and difficult” meetings with the EU boss Michel Barnier last week.

She now is poised for talks to collapse totally between Britain and the EU, which would mean we would leave with No Deal at all.

Ms Foster’s 10 DUP MPs help prop up the British Government, meaning she can pass votes through the House of Commons.

But the party has repeatedly warned that they won’t support her any longer if she signs up for a deal with the EU where Northern Ireland is treated differently to the rest of the EU.

The headache over the Northern Ireland border is one of the main sticking points for a deal with the EU – which Mrs May has just days to get agreement on before a crunch meeting of other leaders.

The Northern Ireland border is one of the main headaches in Brexit negotiations

Ms Foster had meetings with Mr Barnier and other politicians in Brussels this week.

A leaked email from an adviser involved in Brexit talks said: “AF [Arlene Foster] said the DUP were ready for a no-deal scenario, which she now believed was the likeliest one.”

It also said that “she described Barnier as being difficult and hostile in her meeting today.”

The DUP have threatened to vote down the Budget if they don’t get their way over the Northern Ireland border.

But The Irish Sun revealed last week that ministers could be prepared to give them even more money to buy their votes. We told how Mrs May is preparing to hand of tens of millions more to the DUP to get Brexit over the line.

Sources say they are confident a further payment – on top of the £1 billion agreed last year – will pave the way for a deal.

Last year after the snap general election Mrs May agreed a confidence and supply deal with the party to guarantee their support.

Writing on Saturday, Mrs Foster said she appreciated the risks of a no-deal Brexit but “the dangers of a bad deal are worse”.

She added: “The DUP’s actions this week are not as some have suggested about ‘flexing muscle’.

“This is no game. Anyone engaging in this in a light-hearted way foolishly fails to grasp the gravity of the decisions we will make in the coming weeks.”

Theresa May faces a Tory mutiny and increased pressure from her DUP allies over Brexit as a key summit with EU leaders looms.

As negotiations continue in Brussels ahead of a summit starting on Wednesday, the Prime Minister faces a political battle over a plan which could keep the UK in a customs union to avoid a hard border with Ireland.

Former Brexit secretary David Davis said the plan was “completely unacceptable” and urged Cabinet ministers to “exert their collective authority”.