I'll set out my situation then and see what you all think.
I'm disabled and drive a Mercedes B class. Not on the Motability scheme but I could trade in my PIP and make a big advance payment.
When I leased this car privately it cost me £264 per month. The car is now paid up and can be used to trade in against another car, something you miss out on with Motability.
However, I have very specific needs in a car due to my disability. I drive with my left foot as my right leg is fixed and straight. I'm quite tall and struggle to fit in many small cars. I also need a very flat seat with lots of cushioning. Again the seat pitch discounted many cars when I was looking. Mercedes and Volvo are most comfortable for me. I think people seem to view "disabled" as one size fits all and forget the individual physical requirements.
Also what if I need a big car as I have a dog or two so need the boot space, or several children. Should someone be penalised for being disabled. We still lead normal lives on the whole and have just as many needs from a car as anyone else. The same car doesn't suit everyone so uynless you think we should go back to the days of the invalid carriage why can't people have the car they choose, and that suits their needs?