Well this appears to have turned in to the NATS should give up airspace and give a radar service to those outside CAS debate.
Just to say that NATS introduced Farnborough LARS to provide a service to aircraft outside of CAS to try to prevent pilots flying without a service and getting lost.
As for the debate about the complicated airspace, the airspace around Stansted, Gatwick, Luton, and Heathrow has not changed in the last ten years and and in the case of some of the zones, not in the last twenty years.
It may be percieved as complicated, but that is only because it is trying to use as little CAS for the task of the airport and provide the minimum safety distance between aircraft operating in CAS and those that can operate right up[to the edge of CAS with out talking to anyone else.
As for the cars V aircraft argument, I could be flippant and say that is why pilots have maps - so that they don't cross the white lines!!!
I don't know though we must be one of the few countries in the world that regularly allow solo student pilots to fly 500 feet from fully laden B747s and yet require that pilot who is professionally qualified to remain 3nm/1000ft from other aircraft in CAS.
perhaps the safest way forward would be to make all CTAs CTRs and that way we would not need TMZ
I'm hoping that you all know the difference!