Heathrow Chief admits M4 would need to be diesel-free if 3rd Runway went ahead

Heathrow Chief admits M4 would need to be diesel-free if 3rd Runway went ahead

Heathrow Airport's outgoing chief executive Colin Matthews has admitted that the M4 would need to be diesel-free if a 3rd runway was ever built at the airport. Matthews told the aviation specialists Flightglobal that "to fix air quality at Heathrow [you need to] replace the fleet of diesel engines coming down the M4 [motorway]". It is the first time that a senior Heathrow official has been so frank about the air pollution problems the airport is facing.