The U.K. moved Friday to toughen up its entry requirements beyond its surprise decision to ban travel from South America and Portugal in the face of a new virus variant in Brazil, arguing that the measures are needed to ensure Britain’s fast-moving vaccination program isn’t derailed. Conservative Prime Minister Prime Minister Boris Johnson said remaining travel corridors will end Monday and that everyone flying into the U.K. will have to have proof of a negative COVID-19 test taken 72 hours before departure. Under the travel corridor arrangements, anyone arriving in the U.K. from countries deemed safe was exempt from a period of quarantine. Once in Britain, travelers will have to self-isolate for ten days unless they can show evidence of a further negative test at least five days after arrival. The scrapping of the travel corridors came after the government banned travel from South America and […]