Really there should be something in place to prevent this; because again our needs can change in an instant and mean we need to cancel an order and change vehicle, and I agree that its not fair for someone to loose their deposit, I would kick up a fuss to get deposit back even if I knew what I signed but that’s just me and some people simply don’t have the capacity, will power or strength.
I have long said, what we sign at the dealers should be a Motability specific form and not a dealer specific purchase order. Of course if you add factory options, the contact is between you and the dealer for these options and thus provide consumer protection as you well know.
Its good to hear you are able to help other SEND children 🙂