Can the Police Legally give you a Ticket on a private car-park for a non conforming Number Plate?

You beat me to it, but well explained and exactly right in your explanation.

The only point you did not mention is that it is not for the Police to prove how the vehicle got there, if it is deemed a public place the offence is absolute, and a pub forecourt, Supermarket car park or something like NCP are all deemed public places under the Road traffic act 1988.

KC, sorry buddy but RoadRunner and TC are right. Your captured. Unlucky.

Well he clearly wasn’t a traffic officer… as others have pointed out there’s 100% no issue with this ticket… the plate is totally invalid.