From the Motability website:
"The car should be primarily used for the benefit of the disabled customer, but the disabled person does not have to be in the car at all times".
However:
"The car must not be lent, sub-leased or sold".
Source:
http://www.motability...0Motability%20car.pdf
Regrettably it's not unusual for the Motability scheme to be misused. When I was 'trade plating' I often had to collect Motability cars from those who were changing them, or who could no longer use them. It was often evident that the disabled person had probably never used the vehicle.
I called at the address of an elderly and infirm gentleman, in Southend, to collect his vehicle. I had to wait for three quarters of an hour until his grandson arrived with the vehicle. The car had loads of stickers on it, such as I'd expect to see ion a 'boy racer's' car. The radio memories were all tuned to stations broadcasting heavy rock and garage music (with the volume level left at the absolute maximum) and there were over 50 empty fast food boxes (from McDonalds, etc) littering the generally filthy vehicle. The grandson didn't even bother to greet his aged relative. So who, do you think, had really been using that car?
Chris