The incident has caused congestion on the anti-clockwise carriageway, including the Dartford Crossing, with delays currently in excess of 90 minutes.
Road users are advised to leave the M25 anti-clockwise at junction 30, follow the hollow square symbol via the A13 east through Orsett, the A128 north through Bulphan and the A127 west to rejoin the M25 at junction 29.
The response to the incident is being led by Essex Police and our traffic officers, contractors and other emergency services are at the scene.
Live traffic information is available on the Highways Agency’s website and mobile app, and drivers can also listen to traffic bulletins on local radio for updates.
Members of the public should contact the Highways Agency Information Line on 0300 123 5000.
Journalists should contact the Highways Agency press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.