British Airways cabin crew have voted overwhelmingly for strike action in a dispute over sick leave, pay and staffing.
Members of the Transport & General Workers Union (T&G) backed the industrial action by 96%.
The union claims cabin crew are under pressure to turn up for work even if they are unwell.
BA said any industrial action would be “completely unnecessary”.
The airline is due to hold talks on Tuesday to try to avert a series of walkouts.
“We have arranged to meet T&G officials this week and we very much hope they will enter into meaningful discussion with us on the issues the union has raised,” said the airline.
“We have not been seeking to achieve new ways of working by imposition, but by negotiation, as in many other areas of our business,” the airline said in a statement.