Motorway closed in both directions after serious crash on M25 near Heathrow

The M25 is the country’s busiest motorway (Picture: Shutterstock/Jarek Kilian)There are long delays on the M25 after a serious road accident near Heathrow saw both carriageways closed.The air ambulance responded to the crash which involved a car and a motorcycle.Traffic was blocked between J15 and J16 near the Thorney Interchange in west London, according to National Highways.They said: ‘Traffic has been STOPPED in both directions on the #M25 in #Buckinghamshire between J15 (#M4) and