There are severe delays on the M25 this afternoon. 

Drivers are facing hour-long delays as they approach the Dartford Crossing from Kent.

Pictures show long trails of slow-moving traffic on the motorway.

Anyone travelling on the M25 anticlockwise has been told to allow for significant delays to their travel.

This Is Local London: Traffic cameras along the M25 show the anticlockwise delays leading up to the Dartford Crossing tail back to SwanleyTraffic cameras along the M25 show the anticlockwise delays leading up to the Dartford Crossing tail back to Swanley

It is not clear what is causing the delays.

Travel between Junction 3 and the Dartford Crossing, a distance of just 6.6 miles, is estimated to take around an hour.