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Multi-vehicle crash closes clockwise M25 at Waltham Abbey
A multi-vehicle collision has caused a closure on the clockwise M25 between the slip roads at junction 27.
Emergency services are currently at the scene and there are tailbacks to junctions 24 and 25 and current delays are at least one hour.
Traffic is being diverted onto the M11.
A highways agency spokeswoman said the motorway will fully reopen as soon as it is safe to do so.