A crash on a motorway slip road is causing delays leading up to the Dartford Crossing.

The M25 Junction 31 anti-clockwise exit is closed after an accident involving one vehicle.

There is now heavy traffic on the A282 anti-clockwise between Junction 1b and the tunnel.

The Dartford West Tunnel, which had been closed for emergency repairs, has now re-opened.

Drivers are advised to allow extra journey time.