Prime Minister Boris Johnson pushed Britain closer to a no-deal exit from the European Union on Monday, insisting he will not hold Brexit talks with EU leaders unless the bloc lifts its refusal to reopen the existing divorce deal.

Johnson is trying to pressure the EU to give ground by intensifying preparations for the U.K. to leave in three months without a withdrawal agreement.

But the pound fell to a two-year low as business groups warned that neither Britain nor the EU is ready for a no-deal Brexit, and that no amount of preparation can eliminate the economic damage if Britain crashes out of the 28-nation trading bloc without agreement on the terms.

Johnson became prime minister last week after winning a Conservative Party leadership contest by promising the strongly pro-Brexit party membership that the U.K. will leave the EU on the scheduled date of Oct. 31, with or without a divorce deal.

The EU struck a withdrawal agreement with Johnson’s predecessor, Theresa May, but it was rejected three times by Britain’s Parliament. Johnson is insisting the bloc make major changes to May’s spurned deal, including scrapping an insurance policy for the Irish border that has been rejected by U.K. lawmakers.

“The withdrawal agreement is dead, it’s got to go,” Johnson said Monday as he visited a submarine base in Scotland. “But there is scope to do a new deal.”

He said he was “very confident” of getting a new agreement, even though Britain is due to leave the EU in less than 100 days, and the EU insists it won’t reopen negotiations or remove the border “backstop.”

Johnson has spoken to several EU leaders by phone since he took office but has no meetings scheduled. His spokeswoman, Alison Donnelly, said he would not agree to negotiations unless the bloc lifts its refusal to change the withdrawal agreement.

“He remains confident that the EU will stop claiming that the withdrawal agreement can’t be changed,” she said.

If they don’t, she added, “we must assume there will be no deal on the 31st of October.”

Before he took office, Johnson said the odds of Britain leaving the EU without a deal were a million to one.

At one point Monday, the pound had fallen by nearly 1.5% to trade at $1.2214, its lowest level since March 2017.

The pound’s woes illustrate concerns in the markets over a no-deal Brexit. Economists warn that leaving the bloc without an agreement on terms would disrupt trade by imposing tariffs and customs checks between Britain and the bloc. The British government’s financial watchdog says that could send the value of the pound plummeting further and push the U.K. into recession.

The Confederation of British Industry, the country’s biggest business lobby group, urged both Britain and the EU to accelerate Brexit preparations. It made 200 recommendations, including new laws, new IT systems and agreements to temporarily maintain some common regulations.

But it said “the unprecedented nature of Brexit means some aspects cannot be mitigated.”

“It’s like putting sandbags down for a flood. Your kitchen’s still going to be underwater but maybe we can save the bedrooms upstairs,” said the group’s head of EU negotiations, Nicole Sykes.

Another warning came from French automaker PSA, which said it could move production of its Vauxhall Astra model out of Britain if Brexit makes it unprofitable. Chief executive Carlos Tavares told the Financial Times that would mean closing Vauxhall’s Ellesmere Port plant in Wales, which employs 1,000 people.

Johnson, contradicting the opinion of most experts, has said leaving without a divorce deal will be “vanishingly inexpensive” if Britain is properly prepared.

He says he will “turbo-charge” plans for a no-deal Brexit — including beefed-up border measures and a multimillion-pound information campaign for individuals and businesses — and has set up a bodies including a high-level Cabinet “exit strategy committee” to oversee preparations.

However, he faces strong resistance from Parliament, which has consistently opposed a no-deal Brexit.

Beyond Brexit, Johnson has made ambitious domestic policy promises, including more money for police and schools, and major infrastructure projects including high-speed trains.

But independent think tank the Institute for Government said in a report that the effects of a no-deal Brexit would consume much of the government’s energy for years, pushing out other issues and sucking up large sums of money.

“Rather than ‘turbo-charging’ the economy, as Johnson has suggested, the government is more likely to be occupied with providing money and support to businesses and industries that have not prepared or are worst affected by a no-deal Brexit,” it said.

Johnson’s hard line may be popular with Conservative Party members, but it is strongly opposed by pro-EU Britons, including some members of his own party.

The new prime minister met Monday with Scottish Conservative leader Ruth Davidson, who says she won’t support leaving the EU without an agreement.

While the U.K. as a whole voted to leave the EU in 2016, Scotland backed remaining by a large margin.

Johnson was booed by pro-EU and pro-independence demonstrators as he arrived for a meeting with Scottish First Minister Nicola Sturgeon in Edinburgh.

Sturgeon, who leads the semi-autonomous Edinburgh-based government, says Scotland should hold a vote on independence from the U.K. if it is dragged out of the EU against its will.

After the meeting Sturgeon said Johnson had “set the U.K. on an almost-inevitable path to a no-deal Brexit.”

“And I think that is extremely dangerous for Scotland, indeed for the whole of the U.K.,” she said.

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