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Traffic is now back to normal after a lorry crashed near the Dartford crossing - followed by a vehicle breaking down.
All lanes are now open, but there were long delays earlier due to the broken-down vehicle on the M25 Dartford Tunnel anti-clockwise carriageway between J1A for Swanscombe and J31 for West Thurrock.
Congestion is right back to J3 for the M20 Swanley Interchange, with vehicles taking up to an hour to get through the delays.
It follows tailbacks on the same stretch earlier after a lorry crashed.
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