My change over date is 30th April and I ordered on 30th January. My car was in stock when I ordered it (in fact I got to sit in it and take a few pics) and is patiently waiting for me until the end of April.
Frustrating but Motability have said no to an early collection. I terminated a car just over three years ago as unsuitable/needs changed and in reality do not want another one on my account so not willing to push and go down that route.