LONDON — Bellicose threats to stroll away from the bargaining desk. Defiant assertions of British sovereignty and guarantees to not grow to be a “shopper state” of Europe. Ominous speak of a tough border rising once more throughout Eire.

Seven months after Britain exited the European Union, its negotiations with the bloc over a everlasting commerce settlement have fallen into an eerily acquainted cycle of recrimination, brinkmanship and warnings of a “no-deal Brexit,” the identical dire state of affairs that dominated British politics this time a yr in the past.

On Monday, Prime Minister Boris Johnson threatened to interrupt off the talks if there was no deal in place by Oct. 15, two and a months earlier than the official deadline of Dec. 31. And his authorities ready laws that would undermine elements of the political settlement, regarding Northern Eire, that it struck final October to withdraw from the bloc after 47 years.

But for all the Groundhog Day-like similarities, Britain is in a really completely different place than it was a yr in the past — solid off from Europe, consumed by the battle in opposition to the coronavirus and going through an financial disaster that has already sapped the recognition of Mr. Johnson’s Conservative authorities.

That offers Mr. Johnson far much less leverage to push the European Union on the disputed factors of state subsidies of British business and fishing rights, based on consultants. Brussels has proven no signal of yielding, notably on the subsidies, all however guaranteeing that the newest spherical of talks, this week in London, will finish in impasse.

Mr. Johnson appeared to be making ready the floor for some form of breakdown, insisting {that a} no-deal Brexit could be a “good end result” for Britain that will give it management over its legal guidelines and fishing waters, and free it as much as make commerce offers with different nations, together with the United States.

“We’ll prosper mightily consequently,” he declared.

Analysts dismissed a lot of this as posturing, geared toward hard-line Brexiteers in his personal occasion and designed to ship a message that Mr. Johnson shall be harder with the bloc than his predecessor, Theresa Could.

However the laws affecting Northern Eire, first reported by The Monetary Instances, was an sudden growth that would have far-reaching penalties, not simply with the Irish, but additionally with the European Union and the United States.

Underneath the phrases of its withdrawal settlement, Britain signed as much as a sophisticated collection of customs preparations that will protect an open border on the island of Eire. The proposed laws would give Britain a free hand in the way it decides to implement these preparations if it doesn’t attain settlement with the bloc — an aggressive transfer that drew expressions of concern from Irish and European Union leaders.

Different defenders of Eire, together with the Democratic presidential nominee, Joseph R. Biden Jr., would doubtless view any undermining of the settlement as a menace to the Good Friday Accord, which ended many years of sectarian violence in Northern Eire. That, in flip, might jeopardize a commerce negotiation with Washington — one thing that President Trump, an ardent supporter of Brexit, has enthusiastically backed.

“The U.Okay. authorities would possibly need to see how the U.S. election performs out,” stated Anand Menon, a professor of European politics at Kings Faculty London. “The end result of the election goes to have a large bearing on what this authorities goes to do.”

Reneging on the so-called Northern Eire protocol would additionally make it tougher for Britain to conclude a commerce take care of the European Union, a number of consultants stated, as a result of negotiators in Brussels would view their British counterparts with even higher suspicion and demand extra restrictive language.

“They’d say: ‘You’re refusing to implement the settlement we have already got. How we will negotiate a brand new settlement with you?’ ” stated Sam Lowe, an knowledgeable on commerce at the Heart for European Reform, a analysis group in London.

British officers performed down strategies that they plan to tear up the settlement. Mr. Lowe stated he considered it much less as an effort to renege than to extend Britain’s leverage by asserting that it’s in the driver’s seat.

He stated any adjustments could be more likely to apply to bureaucratic procedures, like whether or not firms should file a declaration for items they ship from Northern Eire to Britain.

As the negotiations have floor on, either side have dug of their heels. The European Union is demanding that Britain conform to guidelines that will stop it from pouring state subsidies into companies that may then export freely to the continental market. The British need to have the freedom to assist firms in rising high-tech fields like biotechnology and synthetic intelligence.

Up to now, London has made no counterproposals. That drew a pointy rebuke from the chief European negotiator, Michel Barnier, who final week instructed an Irish analysis institute that Britain had “not engaged constructively” and accused it of a “lack of engagement” on core questions.

Mr. Johnson’s chief negotiator, David Frost, fired again, vowing in an interview with the Mail on Sunday that Britain would by no means grow to be a “shopper state” of the European Union.

Such phrases, some analysts stated, confirmed how little the debate over Brexit had matured in Britain, greater than 4 years after the nation voted to go away the bloc. However additionally they seize the depth of feeling amongst some officers in Mr. Johnson’s authorities about the want for a hard-line Brexit, through which Britain would diverge so far as attainable from the European Union.

The query is whether or not Mr. Johnson can afford to danger a failed negotiation. His recognition has already taken a beating over the course of the pandemic due to a notion that his Conservative authorities botched its response. In Keir Starmer, he faces a extra competent management in the opposition Labour Get together than he did with the earlier chief, Jeremy Corbyn.

A no-deal Brexit would speed up requires independence in Scotland, the place polls are already exhibiting a surge in assist for leaving the United Kingdom. Nationalists in Northern Eire would doubtless seize on any indicators that Britain was not dwelling as much as its guarantees about the border to name for the reunification of Eire.

Regardless of all the theatrics, analysts stated they believed Mr. Johnson would finally strike a take care of Brussels, a lot as he did final yr after an analogous spherical of brinkmanship. The hazard, with solely two and a half months left earlier than the deadline, is that he might miscalculate or just run out of time, notably if his authorities turns into preoccupied coping with a second wave of the coronavirus.

“Boris Johnson nonetheless desires a deal, he nonetheless wants a deal,” stated Mujtaba Rahman, an analyst at the Eurasia Group, a political danger consultancy. “The growing temperature was inevitable, and a recognition that that is the essential window to do the deal. However seeing by way of all of this, it’s very onerous to be assured there shall be a deal.”