Drivers are facing lengthy delays after a crash partially blocked a busy stretch of motorway.
The M25 anticlockwise is partially blocked before Junction 24 for the A111 at Potters Bar.
Congestion is building on the approach to the collision.
Queues are stretching back to Junction 25 for the A10 at Enfield.
Motorists are currently facing travel times of around 30 minutes through the affected section.
Elsewhere on the M25, drivers have faced severe delays following a separate crash near the Dartford Crossing, with traffic backing up into Essex.
The earlier incident caused delays of more than 40 minutes.
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