Perhaps, the time has come for strong leadership.
Would it not be better, for everyone, to just accept the inevitable, and close all of the units?
Just decide that the the Police in England and Wales do not have Air Support, like they don't have many other things that Police in other countries have?
Instead of this fannying around pretending it's all good, and super efficient, just stop doing it. Wouldn't that make the savings calculated so far, seem like chicken feed?
As spending less money on Air Support seems to be what's driving this whole project, it is surely time to move up a gear and do that properly. West Yorks could keep one helicopter for the whole of England, so they still provide the potential for a service, for almost no cost, but retain the need for execs as well as a few cops and pilots.
One aircraft for the whole country, just like that big country to the north of England.