It has now been reopened but there are still delays of up to half an hour with three miles of traffic.
A broken down van has also caused one lane to be closed between J29 (Romford/Basildon) and J30 (Lakeside/Tilbury).
Traffic is now moving slowly anticlockwise through the Dartford Tunnel as well but delays are lasting around 45 minutes.
It happened at 5.15am today after 60mph crosswinds were recorded on the road.
Tags: Thurrock, M25, QE2 Bridge
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