Then there's the fabled Phase 4 - When forces realise what they need from air support and have had enough of not getting it. Some decide to go it alone with the help of a labour Home Office providing rotary ASU's that only operate within their own force boundaries, however they will be available to neighbouring forces at a cost, when NPAS ac cannot provide the required service.
Well, as the saying goes; the wheel just keeps on turning. It eventually gets back to where it was before.