Any more info on this???
I don't have the info the police have in regards to number plates, but you can go on the DVLA website and read through what is allowed and what isn't. Yes, if you have an import car you can run import sized plates, bearing in mind the characters are the right size meaning, speed cameras and the like can read them. I had a stick on number plate on my 1991 Gt-Four, I had it on that car for 3 years and I was never pulled as the year of the car pre-dated the enforcement of the rule, which is you're not allowed to on a more modern car. As long as you do your homework and have something to show them that has led you to believe what is allowed by a reliable source (DVLA), it makes it a lot harder for them to issue you with a penalty and perhaps, give you the benefit of the doubt.