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An accident, fog and the closure of the Dartford tunnel on the first morning back after half term caused traffic to back up as far as Medway and Maidstone this morning
Motorists were at a standstill as far as Swanley on the M25 going north, and all the way along the A2 and up to to Blue Bell Hill on the M2 going London-bound, during rush hour.
An accident reported on the approach to the crossing and a foggy start added to the trouble on the road.
A police spokesman said: "We were called at 5.34am to a collision on the anti-clockwise stretch of the M25 close to the Dartford crossing.
"It involved a lorry and a car, no injuries have been reported.
"Temporary lane closures were put into place to clear the road."
The Dartford tunnel was also closed temporarily before the incident but was quickly reopened.
Delays have eased, but traffic remains slow on the approach to the tunnel.
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