M25 crash LIVE: 'Serious collision' sparks motorway closure as police issue Heathrow and Gatwick travel warning
The anti-clockwise lanes are closed between J11 near Ottershaw and J10 near Cobham following the crash around 11.55pm on Monday.
National Highways said: "The incident scene is now being cleared but this is likely to take several hours and the closure will remain through the morning peak travel period.
"Therefore, please expect long delays on approach to to J11 and also on local routes in the area this morning."
Surrey Police said: "If travelling to Heathrow and Gatwick airport, please check your travel time before you depart as your journey is likely to be impacted.
"The road will be closed for a number of hours to allow a thorough investigation to take place. We will provide an update once the motorway reopens."
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Elsewhere on the M25...
The M25 clockwise between Junction 22 and Junction 23 has reopened after a HGV broke down.
“All lanes have now reopened following the recovery of a broken down HGV,” National Highways has said.
“Residual delays of 30 mins and 3 miles of congestion on the approach.”
What do we know about the crash itself?
The crash was described by police as a “serious collision”, although we know very little about the circumstances surrounding the incident.
The crash happened at around 11.55pm on August 31.
It was severe enough for Surrey Police to initially close the motorway in both directions.
Police spent around six hours at the scene, conducting a forensic investigation at the scene which lasted until around 6am.
But, details around the number of vehicles involved, or the nature of any injuries, have not been released by emergency services.
Congestion stretching back to Junction 13
According to travel site Inrix, congestion is stretching back to Junction 13 (Staines).
Queues of traffic are being diverted via Byfleet to the A3 at Cobham.
What is the clearance time for the collision?
Police investigations have finished, but delays are expected to last throughout this morning.
Heavy congestion is building along the diversion routes, particularly through Byfleet and onto the A3 at Cobham, it has been reported.
“Surrey Police investigations were carried out overnight and completed at approximately 0600,” National Highways says.
“The incident scene is now being cleared but this is likely to take several hours and the closure will remain through the morning peak travel period.
“Therefore, please expect long delays on approach to to J11 and also on local routes in the area this morning.”
What is the diversion route?
National Highways has advised drivers caught up in the M25 delays to follow the diversion route via Hollow Square.
• Leave the M25 at Junction 11
• Follow the A320 through Ottershaw and Woking
• Rejoin the M25 at Junction 10 via the A3
What has National Highways said?
National Highways said police have completed their investigations, but motorists have been urged to avoid the motorway this morning due to the traffic backlog.
"The incident scene is now being cleared but this is likely to take several hours and the closure will remain through the morning peak travel period," they said.
Major crash on the M25 sparks closure
The M25 anti-clockwise in Surrey is closed between Junction 11 (Chertsey) and Junction 10 (Wisley) following a serious collision late last night.
Traffic is severely disrupted during morning rush hour, with queues reportedly stretching back to Junction 13.
Major delays are expected for drivers travelling to Heathrow and Gatwick Airport.
Follow our live blog for the latest travel updates