this is a lot more common then most people think. I used to work for a main dealer parts department and by the chassis number we could tell the actual day the vehicle was made and it have known vehicles to been built 2 0r 3 years even remember 4 years once, before the vehicle was registered.
All you have to do is drive past portbury docks at bristol and see the thousands and thousands of new cars just sat there gathering dust and that should make you realise how common it is.
Ford have airfields full of cars they cant get rid of
