Police, fire and ambulance crews all attended the collision on the M40 [Geograph]
A major motorway was shut in one direction after a serious collision involving multiple vehicles.
National Highways said the M40 northbound in Buckinghamshire was closed at about 01:30 BST.
The closure was in place between Beaconsfield and the Denham interchange, which connects motorists with the M25.
“We expect the road to remain closed until 08:00, possibly longer,” a Highways spokesperson said.
“This is due to a serious collision on approach to junction two involving several vehicles.”
Police, fire and ambulance services all attended the scene and a diversion was put in place.
The Denham interchange at junction 1a is used by motorists wanting to access London Heathrow Airport.
Joining with the M25, it also provides onward journeys to the M1, M4 and M11.
National Highways advised motorists to factor delays into their journey times.
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