Nations throughout Europe and past started closing their borders to vacationers from the UK on Sunday, and the European Union arrange a disaster administration assembly, a day after Britain’s prime minister, Boris Johnson, ordered a wholesale lockdown on London and surrounding areas, citing considerations of a brand new fast-spreading variant of the coronavirus.

Practice stations in London on Saturday night time full of crowds of individuals scrambling to go away the town to flee the brand new restrictions, which went into impact at midnight and successfully quarantined the capital and different areas from the remainder of the nation, the harshest measures to be taken because the nation’s first lockdown in March.

On Sunday, Britain’s well being secretary, Matt Hancock, referred to as those that packed trains “clearly irresponsible.” He additionally stated that the restrictions Mr. Johnson imposed may very well be in place for months.

The primary wave of nations to bar vacationers from the UK had been in Europe. The Netherlands stated it would suspend flights from Britain from Sunday till Jan. 1, noting that the variant present in England was “ thought to unfold extra simply and extra rapidly.”

Italy additionally suspended air journey, and Belgian officers on Sunday enacted a 24-hour ban on arrivals from the UK by air or prepare, which may very well be prolonged. Germany and Switzerland introduced bans on journey between their international locations, and each Britain and South Africa, the place a similarly contagious version of the virus has emerged. Austria, Eire, France and Bulgaria additionally introduced bans. Portugal, which banned journey to and from the UK, is making exceptions for Portuguese nationals or residents.

In the US, Gov. Andrew M. Cuomo of New York urged the federal authorities to take motion, saying that “proper now, this variant within the U.Ok. is getting on a spot and flying to J.F.Ok.,” whereas additionally acknowledging that it might be too late. The State Division stated that its journey advisory to Britain has not been modified and stays at Degree 3.

Spain asked the European Union for a coordinated response, and senior officers from the bloc’s 27 member states met by video convention Sunday night to share their plans. They agreed to resolve on any coordinated motion on the disaster administration assembly, to be held Monday morning.

Inside hours, extra international locations took motion. Iran suspended flights to Britain for 2 weeks, Reuters reported. Israel barred international arrivals not solely from the UK, according to The Times of Israel, but in addition from South Africa and Denmark, the place a coronavirus mutation that occurred in mink was transmitted again into the human inhabitants. Turkey briefly suspended flights from these three international locations, in addition to the Netherlands, Reuters stated.

Transport officers in England stated that they’d improve the variety of law enforcement officials monitoring hubs like railway stations to make sure solely important journeys had been being taken.

Viral mutations are usually not unusual, and British officers stated this variant had been detected in a handful of different international locations. The estimate of larger transmissibility for the British variant relies on modeling and has not been confirmed by lab experiments, stated Muge Cevik, an infectious illness professional on the College of St. Andrews in Scotland and a scientific adviser to the British authorities.

“Over all, I feel we have to have a little bit bit extra experimental information,” she stated. “We are able to’t fully rule out the truth that a few of this transmissibility information may be associated to human conduct.”

The virus disaster got here as one other down-to-the-wire drama was enjoying out for Britons: the trade negotiations between Britain and the European Union. Critics say the British prime minister’s penchant for last-minute selections has difficult the dealing with of the coronavirus and narrowed the window for scrutiny of any commerce cope with the E.U.

Dana Rubinstein and Raphael Minder contributed reporting.