Negligent opening of a car door

Your legal eagle was discussing the offence of negligently opening a car door. Since I was a young police officer and the Road Traffic Act of 1972 was introduced it became an offence.

I picked up the following link and I can’t see any reason why tha act of negligence either by driver or car occupant is in question http://www.pdsolicitors.co.uk/index.php?page=opening-a-car-door