Thanks @rich44 I have now emailed Andrew miller. Motability are useless I seem to get the usual oh no poor you I’ll get this escalated, then nothing happens.
Have Marshall’s agreed to hold the car until you get a final answer from Motability? My worry would be that Motability finally say you can have the car that was ordered, but by then it will be too late as it will have been sold or transferred to another dealership looking for one. I suspect that the chances of them letting you start all over again with another new order for a car that hasn’t been on the scheme for some time now are vanishingly small (if indeed you’d even want to, given the lead times).