Acceptable use and insurance. I was on my way to the shops to buy a turnip for the PIP recipient’s dinner, prove me wrong.
We used to use that excuse back in the day when we had a works van and the bosses telling us we can’t use the vehicles for private purposes however if there was an unfortunate accident (never was) we always were pre armed with the excuse “I was on my way to the service station to fuel up for the next day when I had an accident”.
Mind you it would have been a bit of a stretch of the imagination when you had to pass umpteen petrol stations to get to the one you were going to use. 😁