All British Airways Gatwick flights are being suspended in the latest contraction of air services triggered by the coronavirus crisis.
The airline is to contact customers to discuss their options.
A limited BA schedule is continuing at Heathrow.
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Essential functions at Gatwick are expected to remain in place, including maintenance, towing and cleaning to enable the airline to support the airport and be ready for an efficient resumption of services.
A BA spokesperson said: “Due to the considerable restrictions and challenging market environment, like many other airlines we will temporarily suspend our flying schedule at Gatwick.
Which? Travel editor Rory Boland said: “With British Airways suspending flights from Gatwick the airline needs to provide customers whose flights have now been cancelled with the option of a refund.
“While some may be happy re-booking their holiday for a later date or accepting a voucher, the airline is legally obliged to offer refunds to customers whose flights have been cancelled yet many BA customers say they are struggling to get information on how to get their money back.
“The government must consider all options to support the airline industry through this period, so consumers aren’t left without money they need at this time.”