You don't need to be INCAS to get a radar service, assuming you need one.
You have 2 options OUTCAS:
1. Go VFR and look out of the window. (obviously VMC only)
2. Go IMC and get a radar service (LARS or Lon Mil if nothing else - VMC or IMC)
In either case you still have TCAS as a backstop.
This sounds more like NATS trying to protect their empire - heaven forbid crews should be flying around reponsible for their own traffic & terrain clearance. IMHO I don't see any major justification for slapping CAS around sparsely used areas.
Of course, should these areas become alot busier, that would be a different matter.
16B