Delays on the M25 heading anticlockwise between junction 28 and junction 29 (credit: Highways England )
Five vehicles were involved in the incident between junction 28 for Brentwood and junction 27 for the M11. Congestion is going back to junction 29 for Romford.
Traffic was held until 6.20am while the cars were moved onto the hard shoulder.
All lanes have since been reopened but traffic is queuing back for six miles as a result.
It is unclear if anyone has been harmed in the collision.
Emergency services have been contact for information.Tags: Romford, Brentwood, M25
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