Any county that has done the sums and decided they can sustain the cost of in county air support alongside all the other policing requirements and remain outside the proposed new national organisation should be congratulated for being prudent in the 'boom' years. Perhaps that famous Yorkshire 'thrift'!
For most, it's just not an option due to reducing budgets. Norfolk (5th or 6th largest county) could not afford to replace the aircraft so now rely on a neighbour who themselves have struggled to fund flying hours in the past few years. Cambridgeshire are reducing their annual flying hours at the change over despite then having to rely totally on an aircraft comming from out of county that will inevitably use more hours in transit from that reduced amount. I think we all know the operational 'truth' of the move to NPAS, just that South Yorks are the only force shouting it at present.