T.O.M. it Might be best to give Motability a call or try another dealer as you can get the car from any dealer and get it serviced at another dealer. As it seems they don’t seem to bothered and another dealer might.
For me I guess it would be a drive to an alfa dealer either north or south of where I live as there’s not one locally. Personally that puts any car of the list for me as it’s a pain for the duration of the lease than if i get a car from a dealer that is local.