British Airways cabin crew have announced they will strike on Christmas Day and Boxing Day in a row over pay.
The airline said it was “appalled” at the "heartless" decision by Unite union and promised to get its customers to their destinations.
The row involves around 4,500 so-called mixed fleet cabin crew who joined BA since 2010. Unite say they are on lower pay than other staff.
BA, which employs around 16,000 cabin crew, said in a statement: "We have been informed tonight by Unite that it has called strike action by mixed fleet cabin crew on Christmas Day and Boxing Day.
"We are appalled that Unite proposes to disrupt customers' travel plans on such special days when so many families are trying to gather together or set off on well-deserved holidays.
"This calculated and heartless action is completely unnecessary and we are determined that it will fail.
"We will plan to ensure all our customers travel to their destinations so that their Christmas arrangements are not ruined. We will publish more details within the next 72 hours.
"Meanwhile, we have also approached the conciliation service Acas to seek their assistance in reaching an outcome that would avoid any possibility of disruption."
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