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The west bore of the Dartford Tunnel was closed after a crash involving a car and lorry crashed on the M25 anticlockwise this evening.
The accident closed both lanes on the northbound approach with traffic is being diverted via the east bore.
At its height congestion going back 19 miles to J3 of the M20/A20 Swanley Interchange.
All lanes have now reopened but delays continue.
Listen to kmfm for the latest news and travel updates.