The point is that we've now reached a situation where, come early next year, it will be non compliant trains or no train at all on some routes. This helps no one, disabled or not. Northern has 101 non compliant Pacers. So they'll need to withdraw them at a rate of nearly four per week if they start now. Elsewhere, AGA still seem to believe that they will have 27 compliant 317s by the end of the year. The first unit has been at Kilmarnock for eight months. Are they seriously suggesting the rest can be done at the rate of one per week?
It should be fairly straight forward to limit unmodified units to peak times or running in pairs with modified units. That way everyone can travel on every route. In any case, thousand of disabled people already travel on the network. Even when the fleet is all done, there will still be lots of people that won't have the confidence to travel alone. My mum being one example. No way would she travel alone but she will with a friend ar relative. She's perfectly capable of using a small toilet so PRM mods are irrelevant to her. One thing she does struggle with is sudden or loud noises. So the piercing noise when the doors release, e.g. on a 175, would not be popular. I think the loud bang from the doors of 150s, 317, 319 etc. when another train passes would also cause a problem.