UPDATE: Four people taken to hospital following crash
A woman is being freed from her car after a collision on the northbound M1.
Paramedics and firefighters were called after a collision between a lorry and two cars on the northbound M1 between junction 4 and 5.
They are currently treating five people at the scene for back and neck pains.
Hertfordshire Fire and Rescue are having to use cutting equipment to free the woman from her vehicle.