British Airways cabin crew have voted in favour of a strike.
Four out of every five union members who took part in a ballot voted to go ahead with industrial action over pay and working conditions.
Speaking at a press conference, Unite assistant general secretary Len McCluskey said there had been an 80% participation rate in the ballot.
Strikes could begin as early as March 1, while union leaders have pledged not to strike over Easter.
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Bob Atkinson, travel expert from travelsupermarket.com, said: “Customers are already deserting the airline – at travelsupermarket.com we have seen a significant 19 per cent reduction in people clicking through to BA flights since this latest ballot started.
“Customers will undoubtedly be questioning why and how their travel plans could be disrupted by possible strike action yet again.”
This was the second time the 12,000 cabin crew were asked to vote. A 12-day strike at Christmas was blocked by the High Court.