The M25 anticlockwise is closed, with stationary traffic at A282 (Dartford River Crossing toll booths).
The tunnel has been closed due to the accident that has blocked the carriageway between J31 and J30.
More top news
Beekeepers in the South East of England have produced the second highest amount of honey in the country this year, a survey has found.
Wednesday morning's weather for the east of the region
Wednesday morning's weather for the west of the region