From what I understand regarding the radar the primary is provide by RAF Waddington and the secondary is provide by RAF Scampton. The problem is that at those ranges low cover (below 4000ft) can not be guareented. Eventually the radar service will be piped from RAF Waddington into Liverpool and controllers at Liverpool will provide the service. The problem is though is that Liverpool controllers operate within controlled airspace and Robin Hood airport is in uncontrolled airspace. Add to this the fact that Liverpool controllers will be unfamiliar with the area, with the large amount of military and general aviation traffic and the problem with radar coverage at low level, should make things interesting.