Oh I've known that for years as plate has been on all my fast cars. Luckily the Scottish plod contingency are a lot more forgiving type (famous last words!!) and testimony due to plate.
Day comes I have no choice to revert to standard, I have plates in my boot.
I know, I live in dread of having to replace mine on the front (which is suffering from a small amount of delamination behind the plastic) because I know exactly how much of the stuff I used