Hi Chris, my understanding is that you can only have one vehicle tax exemption at a time. Your Motability car automatically benefits from not having to pay VED, so is not factored into the price you pay for the car. Technically, this means that you shouldn’t have claimed exemption on the 2nd car in the past. You may be better of just dropping it now in case they try to apply the VED retrospectively!!
Sean
Current car Hyundai Kona Ultimate EV