British Airways CEO Sean Doyle looks on at a news conference at Heathrow Airport in London, Britain, May 17, 2021. REUTERS/John Sibley 

British Airways CEO Sean Doyle speaks at a news conference at Heathrow Airport in London, Britain, May 17, 2021. REUTERS/John Sibley 

Heathrow Airport CEO John Holland-Kaye and British Airways CEO Sean Doyle hold a joint news conference at Heathrow Airport in London, Britain, May 17, 2021. REUTERS/John Sibley 

British Airways CEO Sean Doyle speaks at a news conference at Heathrow Airport in London, Britain, May 17, 2021. REUTERS/John Sibley 

Heathrow Airport CEO John Holland-Kaye speaks at a news conference at Heathrow Airport in London, Britain, May 17, 2021. REUTERS/John Sibley 

Heathrow Airport CEO John Holland-Kaye looks on at a news conference at Heathrow Airport in London, Britain, May 17, 2021. REUTERS/John Sibley 

Heathrow Airport CEO John Holland-Kaye and British Airways CEO Sean Doyle hold a joint news conference at Heathrow Airport in London, Britain, May 17, 2021. REUTERS/John Sibley 

Tail fins of British Airways Embraer 190 aircraft are pictured at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

British Airways Embraer 190 aircraft takes off from London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

British Airways Embraer 190 aircraft are pictured at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

British Airways Embraer 190 aircraft takes off from London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

Passengers board a British Airways Embraer 190 aircraft as the new remote control tower is seen in the background at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

Passengers board a British Airways Embraer 190 aircraft at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

Tail fins of British Airways Embraer 190 aircraft are pictured at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

Passengers board a British Airways Embraer 190 aircraft at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

A cyclist rides past a decommissioned British Airways Boeing 747 jumbo jet parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

A classic car is driven past a decommissioned British Airways Boeing 747 jumbo jet parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

A motorbike is ridden past a decommissioned British Airways Boeing 747 jumbo jet parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

A cyclist rides past a decommissioned British Airways Boeing 747 jumbo jet parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

A man views decommissioned British Airways Boeing 747 jumbo jets parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

Decommissioned British Airways Boeing 747 jumbo jets are seen parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

Decommissioned British Airways Boeing 747 jumbo jets are seen parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

A man views decommissioned British Airways Boeing 747 jumbo jets parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

Decommissioned British Airways Boeing 747 jumbo jets with engines removed are seen parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

A helicopter flies near British Airways Boeing 747 jumbo jets parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

Decommissioned British Airways Boeing 747 jumbo jets, partially dismantled, are seen parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

Decommissioned British Airways Boeing 747 jumbo jets are seen parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

A decommissioned British Airways Boeing 747 jumbo jet with engine removed is seen parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

Decommissioned British Airways Boeing 747 jumbo jets are seen parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

Decommissioned British Airways Boeing 747 jumbo jets with engines removed are seen parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

A man views decommissioned British Airways Boeing 747 jumbo jets parked to be used for salvage and parts after the airline retired its whole 747 fleet, amongst the spread of the coronavirus disease (COVID-19) pandemic, Cotswold Airport, Kemble, Britain, April 23, 2021. REUTERS/Toby Melville 

Eurowings airliner lands next to British Airways jets parked on the tarmac at Palma de Mallorca airport, Spain March 20, 2021. REUTERS/Enrique Calvo 

British Airways jets sit parked on the tarmac at Palma de Mallorca airport, Spain March 20, 2021. REUTERS/Enrique Calvo 

A British Airways aircraft flies over London, Britain, February 13, 2021. REUTERS/Toby Melville 

A British Airways aircraft makes its landing approach with a drive through COVID-19 test centre seen in the foreground, amid the spread of the coronavirus disease (COVID-19) pandemic, Heathrow Airport, London, Britain, January 16, 2021. REUTERS/Toby Melville 

A British Airways aircraft makes its landing approach with a drive through COVID-19 test centre seen in the foreground, amid the spread of the coronavirus disease (COVID-19) pandemic, Heathrow Airport, London, Britain, January 16, 2021. REUTERS/Toby Melville 

A British Airways plane takes off at the O.R. Tambo International Airport in Johannesburg, South Africa, December 22, 2020. REUTERS/Siphiwe Sibeko 

Passengers tag their luggage before checking at the counter of British Airways, as the Mexico's government analyses to suspend flights from the U.K. due to fears about a highly infectious new coronavirus strain amid the coronavirus disease (COVID-19) outbreak, at the Benito Juarez International Airport, in Mexico City, Mexico December 21, 2020. REUTERS/Luis Cortes 

Passengers are seen at the counter of British Airways to check in for their flights to London, as the Mexico's government analyses to suspend flights from the U.K. due to fears about a highly infectious new coronavirus strain amid the coronavirus disease (COVID-19) outbreak, at the Benito Juarez International Airport, in Mexico City, Mexico December 21, 2020. REUTERS/Luis Cortes 

A sign is pictured as passengers check-in their flights to London at the counter of British Airways, as the Mexico's government analyses to suspend flights from the U.K. due to fears about a highly infectious new coronavirus strain amid coronavirus disease (COVID-19) outbreak, at the Benito Juarez International Airport, in Mexico City, Mexico December 21, 2020. REUTERS/Luis Cortes 

A passenger is assisted by an airline employee whilst arriving to the counter of British Airways, as the Mexico's government analyses to suspend flights from the U.K. due to fears about a highly infectious new coronavirus disease (COVID-19) strain, at the Benito Juarez International Airport, in Mexico City, Mexico December 21, 2020. REUTERS/Luis Cortes 

A passenger of the British Airways airline arrives at Galeao International airport, amid the coronavirus disease (COVID-19) outbreak in Rio de Janeiro, Brazil December 21, 2020. REUTERS/Pilar Olivares 

Passengers and crew members of the British Airways airline arrive at Galeao international airport, amid the coronavirus disease (COVID-19) outbreak in Rio de Janeiro, Brazil December 21, 2020. REUTERS/Pilar Olivares 

Passengers of the British Airways airline arrive at Galeao international airport, amid the coronavirus disease (COVID-19) outbreak in Rio de Janeiro, Brazil December 21, 2020. REUTERS/Pilar Olivares 

Passengers of the British Airways airline arrive at Galeao international airport, amid the coronavirus disease (COVID-19) outbreak in Rio de Janeiro, Brazil December 21, 2020. REUTERS/Pilar Olivares 

Passengers of the British Airways airline arrive at Galeao international airport, amid the coronavirus disease (COVID-19) outbreak in Rio de Janeiro, Brazil December 21, 2020. REUTERS/Pilar Olivares 

A passenger of the British Airways airline holds up a child as she arrives at Galeao international airport, amid the coronavirus disease (COVID-19) outbreak in Rio de Janeiro, Brazil December 21, 2020. REUTERS/Pilar Olivares 

A passenger of the British Airways airline using a plastic cover is embraced by her relatives as she arrives at Galeao international airport, amid the coronavirus disease (COVID-19) outbreak in Rio de Janeiro, Brazil December 21, 2020. REUTERS/Pilar Olivares 

Passengers of the British Airways airline arrive at Galeao international airport, amid the coronavirus disease (COVID-19) outbreak in Rio de Janeiro, Brazil December 21, 2020. REUTERS/Pilar Olivares 

General view of British Airways terminal at JFK International Airport in New York City, U.S., December 21, 2020. Picture taken through glass. REUTERS/Eduardo Munoz 

A man walks near the British Airways terminal amid new restrictions to prevent the spread of coronavirus disease (COVID-19) at JFK International Airport in New York City, U.S., December 21, 2020. REUTERS/Eduardo Munoz 

A plane of British Airway arrives from London amid new restrictions to prevent the spread of coronavirus disease (COVID-19) at JFK International Airport in New York City, U.S., December 21, 2020. REUTERS/Eduardo Munoz 

Passengers arrive on a flight from London amid new restrictions to prevent the spread of coronavirus disease (COVID-19) at JFK International Airport in New York City, U.S., December 21, 2020. REUTERS/Eduardo Munoz 

A passenger arrives on a flight from London amid new restrictions to prevent the spread of coronavirus disease (COVID-19) at JFK International Airport in New York City, U.S., December 21, 2020. REUTERS/Eduardo Munoz 

Passengers arrive on a flight from London amid new restrictions to prevent the spread of coronavirus disease (COVID-19) at JFK International Airport in New York City, U.S., December 21, 2020. REUTERS/Eduardo Munoz 

Passengers arrive on a flight from London amid new restrictions to prevent the spread of coronavirus disease (COVID-19) at JFK International Airport in New York City, U.S., December 21, 2020. REUTERS/Eduardo Munoz 

A sign is pictured at a counter of British Airways, as Mexico's government analyses whether to suspend flights from the UK due to fears about a highly infectious new coronavirus strain, at the Benito Juarez International Airport, in Mexico City, Mexico December 21, 2020. REUTERS/Luis Cortes 

A view shows the counters of British Airways, as Mexico's government analyses whether to suspend flights from the UK due to fears about a highly infectious new coronavirus strain, at the Benito Juarez International Airport, in Mexico City, Mexico December 21, 2020. REUTERS/Luis Cortes 

A passenger checks his documentation near to a counter of British Airways, as Mexico's government analyses whether to suspend flights from the UK due to fears about a highly infectious new coronavirus strain, at the Benito Juarez International Airport, in Mexico City, Mexico December 21, 2020. REUTERS/Luis Cortes 

A passenger speaks on the phone after asking for information at the counter of British Airways, as Mexico's government analyses whether to suspend flights from the UK due to fears about a highly infectious new coronavirus strain, at the Benito Juarez International Airport, in Mexico City, Mexico December 21, 2020. REUTERS/Luis Cortes