Updated 3.45pm. Likely to remain shut for several hours.
Essex Police are reporting the road closed between Horsley Cross and Primrose Lane.
A WOMAN has died in a road accident and two other people have been taken to hospital.
Police are still on scene.
The collision was between a Honda Jazz and a Ford Transit van travelling in the opposite direction at around midday.
The woman, who was driving the Honda, sadly died at the scene.
The male van driver was airlifted to the Royal London Hospital with serious injuries.