- Firefighters put out a car on fire at the crash scene near Sheering, north east of Harlow
- Three people were cut out of cars at the scene of the crash by firefighters
The motorway will reopen as soon as it is safe to do so but the closure is expected to last for several hours, through the evening rush hour and into this evening. Current delays are at least 30 minutes.
Drivers, and in particular those wishing to travel to Stansted Airport are advised to plan their journeys and allow extra time to travel.
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Police have released an e-fit of a man suspected of attacking her.
The force has been tweeting after carrying out a series of dawn raids.
Adenike Akingbogun made the dangerous manoeuvre after ignoring the crossing lights and driving onto the tracks.