- 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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Eyewitnesses report hearing the engine on Ford's vintage aircraft spluttering before cutting out approximately 500 feet above the ground.
Police are investigating whether a Land Rover Defender found burnt out in West Horsley was involved in Tuesday night's ram raid.
The work, called Gift Horse, replaces the giant blue cockerel that previously sat on the plinth.