The U.K. flag carrier will add trans Atlantic flights from London’s Heathrow Airport to Boston and Miami, increasing the daily frequency to two from one. We have long-haul cabin crew to operate these services, a company spokesman said.BA later Wednesday plans to detail its contingency measures to cope with a five day strike beginning May 30, the second in a series of three stoppages by cabin crew protesting the airline’s changes to working practices in a long-running dispute.

Meanwhile, BA said it may return to court to seek a trial to challenge the communication of strike ballot results by Unite, the union representing cabin crew. BA won an injunction to block 20 days of industrial action, but the ruling was overturned by the Court of Appeal, allowing the current strike to go ahead.