Travellers arrive from France on the Eurostar train at St Pancras International railway station in London, Sunday July 18, 2021. The British government announced the removal of quarantine requirements for fully vaccinated travellers from much of Europe, but threw holiday plans of thousands into disarray when it reversed plans to open up travel from France because of concerns about the spread of the Beta variant, of COVID-19. (Yui Mok/PA via AP)