Heathrow airport plunged into traffic jam chaos after technical failure

British holidaymakers have been plunged into travel chaos for the second time in a week after Heathrow Airport was forced to shut one of its tunnels. This morning, passengers are facing huge delays after a 'technical fault' caused a road tunnel connecting to Terminals 2 and 3 to close. Roads leading up to the airport - one of the biggest in Europe - are gridlocked due to the closure, with some desperate flyers sprinting down the motorway with their luggage to catch their flights.