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
Amanda Houston presents the weather forecast for the east of the Meridian region.
Amanda Houston presents the weather forecast for the west of the Meridian region.
A report by the CQC health watchdog has criticised the Southern Health NHS Trust for still not doing enough to protect those in its care.