Passengers hoping to fly out or into London’s Heathrow Airport are facing another day of serious disruption because of strikes by British Airways staff.Some 70,000 people, many of them stranded, will be prevented from travelling until seven o’clock this evening. A further five airlines have been affected by the disruption at the world’s busiest airport. One passenger said: “They’ve cancelled all European flights, so we hope one way or another they’re going to say something. Otherwise we have five hours to wait before we fly.” Another said: “This lightning strike must be unacceptable. The baggage handlers need to remember that these are the customers who pay their wages.” Around 1,000 BA luggage handlers, bus drivers and other staff stopped work yesterday, in support of hundreds of workers sacked this week by a catering firm that provides the airline’s in-flight meals. Gate Gourmet employees walked out in protest at planned changes to pay and conditions. Negotiations between the firm and unions ended in failure yesterday and it is unclear what will happen next. BA is also unsure when it will be able to resume normal service. Nearly a hundred of its planes and a thousand of its cabin crew are now in the wrong places.