Financial records? Could have bought it for his dad as a present, and be doing it up to his dads tastes.
I know that's all bollocks, but prove to the contrary.

It's not what you know, it's what you can prove...

As for all that other bollocks, I would like to think what with knife crime etc as it is, the police would have better things to do than chase up someone who is driving (technically) legally, albeit in an "interesting" way.