LONDON—Britain will be able to work with the European Union to ensure there is no disruption to vaccine supplies, Health Minister Matt Hancock said on Tuesday, arguing protectionism was not right during a pandemic. German Health Minister Jens Spahn earlier said he backed proposals to restrict vaccines leaving the EU, saying Europe should have its “fair share.” The European Commission later said it had no plans to impose an export ban, explaining its proposal would require firms to register vaccine exports. “I’m sure that we can work with the EU to ensure that, whilst transparency is welcome, that no blockers are put in place,” Hancock said at the Chatham House think tank. He said he had spoken to the chief executives of Pfizer and AstraZeneca, who gave him confidence supplies would not be disrupted, but he still cautioned against any hints of vaccine nationalism. “I think protectionism is not the …