You dont need the parking space the car is taking up, so what’s the problem? Otherwise:
1. There’s nothing illegal about parking on the road unless the vehicles abandoned
2. If its not legal then the police will take action
Nothing will happen unless you
a. talk to the driver, what I would do
b. report it
I really cant see your problem, talk to the guy or report it.
Im taking it you’re in the “didn’t bother to read the rest of the thread” camp, as im am already aware of all the points you’ve posted, but how would you suggest I speak to the owner when I (or any of the neighbours I’ve asked) don’t have a clue who owns it? If you can find the owner for me, I’ll happily talk to them.
As Dickyboy has pointed out, there may be a valid reason for it being where it is, hence why im not taking any action on it just yet.