Labour under fire over BA strike
David Cameron has accused Gordon Brown of failing to act over the BA strike because the Unite union is "bankrolling" the Labour party.
The Tory leader hit out at Labour's "vested interests" after a three-day cabin crew strike began.
BA chief executive Willie Walsh personally apologised to passengers in a video message, saying: "I am deeply sorry. This is a terrible day for BA."
He said he had received many messages of support from customers, some of whom had urged him to "stand firm" against union pressure over cost-cutting.
BA has warned passengers flights could be cancelled even after the first three-day cabin crew strike ends because of a "knock-on effect" on flight scheduling.
The airline is urging people to check its official website www.britishairways.com to find out which services will be operating and what happens to affected customers.