A serious accident has closed the QE2 bridge. 

An accident on the Kent side means all clockwise traffic is using one bore of the Dartford Tunnel.

A13 Londonbound queues are back to the Stanford le Hope bypass as a result. 

M25 clockwise queues are back to J29.

Also queues Londonbound on A1306 Arterial Road West in Thurrock – and on many roads in the surrounding area.

More to follow.