To answer the original question, no. To ‘incentivise’ one fuel type over another means that, by default, those driving other types of car would be subsidising them. The aims of Motability are to provide an easy solution for disabled drivers to run a new car every 3 years, not to force people into one type of car over another, or to be eco campaigners. That’s not their core purpose. Of course, there should be plenty of EV’s available through Motability (more than at present), but those wanting one should pay an AP appropriate to the lease cost and do the sums of any extra AP versus the cheaper running costs.