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There are still long delays of over an hour at the Dartford Crossing after an earlier crash.
The accident temporarily closed the anti-clockwise left-hand tunnel at the Dartford route, on the A282 northbound between J1a and J31, at around 3.30pm this afternoon.
The damaged vehicles have now been cleared and the tunnel re-opened, but National Highways says there is a four-mile tailback with delays of around an hour.
There are no reports of any injuries.