Not surprised with the disbelief, if i was reading a post like this i would think the same, i have changed the reg and no other details a number of times with same result, i have a cherished plate on my daily also but changing that makes no difference, its only a z issue, maybe its because its a Irish dateless number, not sure. on the 12th of Feb when payment goes out i will be on the phone to put the private plate back on, see what happens. if it goes up i will put it on retention maybe sell it. Its a FIL number 