Police are generally t055ers in my experience and like to concentrate on all the small things that aren't important. Like number plates
This is why I paid around £300 in the first 6 months of 2011 in fines for having a sticky number plate.
Each and every time I would explain that the plate would be less visible using the standard mounting brackets and would block the radiator air flow. I always added that the car was an import so shouldn't conform to the usual BS on uk cars of having silly little numbers and letter at the bottom... they didn't listen so now I don't bother with a plate at the front.
Been like this for months and not had a single issue haha