/ Source: The Associated Press
British Airways PLC cabin crew plan say they will strike for a total of 20 days over a 23-day period in May and June.
The Unite union says that staff plan to walk out May 18-22, May 24-28, May 30-June 3 and June 5-9.
The unprecedented scale of the strike action ramps up a long-running and bitter dispute between cabin crew and the airline over changes to pay and working conditions.
Two strikes by crew over seven days in March cost the airline around 45 million pounds ($65.8 million) in canceled flights and contingency provisions, including hiring other aircraft complete with staff.