A mental health patient tried to escape from the van transporting her by smashing a window with a fire extinguisher.
The woman was being taken back to her residence in a private vehicle on Monday when she tried to make her escape through the broken window.
Barnet police were called to the M1 to support the private company escorting her.
The woman suffered minor injuries as a result of her attempts to escape but was contained before she managed to leave the confines of the vehicle.
An ambulance was called to assess her, and she was then able to complete her journey after a new private vehicle was sent.