A woman was cut free from her car and taken to hospital after a collision this morning on the A406.
The crash involved three cars on the westbound stretch between the Waterworks and Crooked Billet roundabouts at just after 10am.
Paramedics treated a woman in her 40s for a neck injury and she was taken to North Middlesex Hospital.
Two lanes are currently closed with queues heading back beyond the M11 and A12 junctions.
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