Hi Fred,
I really wouldn’t worry about it.
My wife has a mobility car, but because of her condition isn’t able to drive.
With my job, I either get a company car or a car allowance, but to get the car allowance I have to provide evidence of insurance that includes business use.
A simple phone call was all it took to arrange, as for evidence, you can get a copy of your insurance certificate.
Cheers,
Mark.