Your right Parksy!
But you have to see the funny side of this, there are thousands and thousands of illegal number plates on UK roads. When it comes to MOT time they whip em of and put on the legal format plate. Cracked and delamimating plates that cameras may not read correctly are illegal and MOT failures, but there are lots of them on the road and that's without the hand written bits of card that gets stuck on the backs of trailers and caravans and even the odd HGV trailer.
It takes a few second to obtain a non legal laminated legal appearing plate on line I've now found, with a nudge and a wink they are sold as "show" plates.
As Thorpedo has hilighted, cloned plates are a problem that legislation seems powerless to stop. Hhat is the point in changing the legislation and who benefits from the change?
The adhesive reflective plates that are still on sale, were an easier option years ago, they don't fall off, don't need holes drilling in the caravan, and they do not delaminate, the numbers come off quite easily if you changed your car regularly or lent your caravan to somebody else to tow.
Of course loaning your caravan out is another isssue for some of this sites caring worrymongerers
So please forget that idea!