AN accident involving two vehicles is causing long delays on the M25.

One lane of the motorway is blocked between junction 28 for the A12 and junction 27 for the M11.

Traffic is queuing back past junction 28. 

Read more:

Drivers are advised to avoid the area if possible.

There is also slow traffic at the QE2 bridge on the M25. 

The delays have been caused by an earlier broken down vehicle.

There is heavy traffic on the M11 between junction 5, for Loughton, and junction 4, for the North Circular.