U.K. Airports Warn of Strike Gridlock, 12-Hour Delays

Passengers arriving at BAA Ltd.’s Heathrow, Europe’s busiest airport, on Nov. 30 will have to wait up to 12 hours to clear immigration if a strike by customs staff proceeds, the London field’s operator warned as the government said it will ensure U.K. borders are safe.

Normand Boivin, chief operating officer of Heathrow, wrote to airlines yesterday to ask them to cut loads in half in order to avoid “gridlock.” Gatwick Airport, south of the U.K. capital, has asked airlines to help passengers switch flights.