Illegal car?????????????
As I own a 5 digit UK numberplate (which I purchased as a personalised numberplate) including a "1" a different law applies:
R1 WFS
I must use the correct legal font.
I must have the correct spacing between letters/numbers.
I must have a certain sized border overall (This is what allows me to have a shortened numberplate which required a USA front numberplate mount to look good).
They contain all the legal markings (manufacturer name/manufacturer postcode/Legal BSAU marking) which a genuine numberplate manufacturer woul not put on if it was a non legal "showplate".
All legal parameters are correct so the numberplates are totally legal in the UK.
Is there anything else he is not happy with?