Drivers are facing major disruption after a crash brought traffic to a halt on a busy stretch of motorway.
The M25 clockwise is affected between Junction 27 for the M11 and Junction 28 for the A12, where all traffic is currently being held following the collision.
Delays are building on the approach to the incident, with motorists unable to pass the scene while it is dealt with.
It is not yet known how many vehicles were involved or whether anyone has been injured.
Drivers are being advised to allow extra time for their journeys and consider alternative routes where possible.
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