Just a word of caution from an ex traffic cop for all those rushing out to buy these plates , they will make no difference whatsoever on any camera other than a rear facing camera during the hours of darkness. Mobile cameras and forward facing cameras are not dependent on a flash.
Secondly should you happen to be caught with these the least you are likely to face is obstructing the police and the worst you will be liable to arrest for attempting to pervert the course of justice which is porridge time. I guess it all depends no where your licence is at points wise as to whether you consider it worth the risk?
It doesn't bother me one iota as said ex is the operative word, just letting you know what your hard earned £50 plates could cost you.