Spooky isn't it.
We sold a Renault Megan With it's personnel plate in about 2003, at that time we lived in East London but part exchanged it to a dealer in Hertfordshire.
We moved/retired to deepest Essex in 2010, about 2hrs drive from east London and 3hrs from Hertfordshire, and since then we have seen the Renault many times in our local area, it still has the personnel plate.