Scrap numberplates

I have just read your article about thieves using stolen and cloned numberplates (MCN, December 19). Surely it does not take Einstein to figure this one out? All vehicles have a unique code, the VIN number. Why are all vehicles not tagged at the factory? Then all the security services would scan this number. The cost would be negligible, how much does it cost to microchip a dog? I cannot believe we still rely on a number screwed on the outside of the vehicle. I realise the poseurs who waste thousands on personal plates might not be happy, but I am sure they can find other ways to waste their money. Peter Wilson, email