People who work in the UK aviation and travel industry take part in a 'Travel Day of Action' protest across the street from the Houses of Parliament in London, Wednesday, June 23, 2021. The protest on Wednesday was attended by people from across the UK aviation and travel industry calling on the British government to safely reopen international travel for the peak summer season to protect travel jobs and businesses amidst Britain's widely praised rollout of coronavirus vaccines. (AP Photo/Matt Dunham)

People who work in the UK aviation and travel industry take part in a 'Travel Day of Action' protest across the street from the Houses of Parliament in London, Wednesday, June 23, 2021. The protest on Wednesday was attended by people from across the UK aviation and travel industry calling on the British government to safely reopen international travel for the peak summer season to protect travel jobs and businesses amidst Britain's widely praised rollout of coronavirus vaccines. (AP Photo/Matt Dunham)

British Airways cabin crew take part in a 'Travel Day of Action' protest across the street from the Houses of Parliament in London, Wednesday, June 23, 2021. The protest on Wednesday was attended by people from across the UK aviation and travel industry calling on the British government to safely reopen international travel for the peak summer season to protect travel jobs and businesses amidst Britain's widely praised rollout of coronavirus vaccines. (AP Photo/Matt Dunham)

British Airways flight take part in a 'Travel Day of Action' protest across the street from the Houses of Parliament in London, Wednesday, June 23, 2021. The protest on Wednesday was attended by people from across the UK aviation and travel industry calling on the British government to safely reopen international travel for the peak summer season to protect travel jobs and businesses amidst Britain's widely praised rollout of coronavirus vaccines. (AP Photo/Matt Dunham)

British Airways flight and cabin crew pose for photographers as they take part in a 'Travel Day of Action' protest across the street from the Houses of Parliament in London, Wednesday, June 23, 2021. The protest on Wednesday was attended by people from across the UK aviation and travel industry calling on the British government to safely reopen international travel for the peak summer season to protect travel jobs and businesses amidst Britain's widely praised rollout of coronavirus vaccines. (AP Photo/Matt Dunham)

People who work in the UK aviation and travel industry take part in a 'Travel Day of Action' protest across the street from the Houses of Parliament in London, Wednesday, June 23, 2021. The protest on Wednesday was attended by people from across the UK aviation and travel industry calling on the British government to safely reopen international travel for the peak summer season to protect travel jobs and businesses amidst Britain's widely praised rollout of coronavirus vaccines. (AP Photo/Matt Dunham)