why not, if your born in to richness or earnt it, either way good on em.
bit funny, but i reckon its on there for a laugh rather then being serious.
no its a green p for thoise that have passed yet it can only be displayed for 4 weeks, which after that your no longer classed as a new cautious driver
and yes technically it is illegal to display l plates were the driver is an experienced one, but who whos