A CRASH has blocked a lane of the M25 - with traffic building back to the A127.

The crash happened on the exit slip road of the motorway at junction 30 with the A1282 at Lakeside Shopping Centre in Purfleet.

It is not known how many vehicles were involved in the crash, but delays are stretching back to junction 29 of the motorway with the A127.

Motorists are advised to avoid the area, or allow extra time when travelling.