1973 my boss drove from Romford to Bristol on business in a hired Cortina Mk2.
On the way home he was stopped by the Police near Reading on M4.
He had to get a taxi & hotel for the night, as he had no insurance to cover driving that car & then a train back to Bristol in the morning & then discovered he needed to extend the hire with a penalty for not renewing before expiry. The Police drove the car back to Bristol for the owner.
My how we laughed and how cross he became every time we rattled keys.