From the article:
The unions said the action was due to a 10% pay cut imposed during the peak of the pandemic not being reinstated.
Some 500 Unite members recorded a 94.7% vote in favour of industrial action, while 95% of GMB members backed the walkouts.
The strike dates will be confirmed in the coming days.
The proposed action relates to fewer than 50% of British Airways staff based at Heathrow in customer-facing roles only, and there are other customer service workers who have not been balloted.
It is understood that if strikes go ahead, BA, which operates from terminals three and five at Heathrow, has plans to cover staff, including managers potentially dealing with check-ins.
However, there would still be disruption for passengers, especially at terminal five, leading to cancellations, which would be focused on routes with several daily flights.