Re: ANPR video footage of car showing some activity in the back of the car and driver leaning towards passenger seat:
If he hasn’t knocked her out at this stage she must have realised they’ve now passed Brixton / Tulse Hill and are heading in the wrong direction. Could she have become agitated ?
When I was a teenager a girl went missing in similar circumstances and my mom told me that if I end up in a car and the person seems to be driving off with me with bad intentions I should make them have a car accident by jumping on the wheel.
Maybe she did but WC is stronger and kept the car under control however it could have been caught on another ANPR or someone witnessed a near accident thus leading to investigating the car and driver. JMO.
https://livetrains.co.uk/jamCams/archive/00001.03901/vid/1614808846.mp4