Yes this topic got a fair workout on various fora and Facebook sites. See http://caravanersforum.com/viewtopic.php?f=2&t=58145&hilit=Number+plate
Kedron are aware of the issue and are now locating the plates appropriately.. we moved ours down to the bumper bar between the two spare tyres, with wiring and the little illuminating light above it. then we ordered a number plate from a commercial firm which read "Top Ender" and put that over the old site, to cover the screw holes etc. I had a photo of it all somewhere and if I find it I will post here.