Well someone is way behind operational practice, and as ever, it's the CAA, more importantly SRG..
There are a miriad of airlines operating into airports outside CAS and although the CAA (SRG) are willing to give more and more airspace away to the military (the whole of the north sea north of Y70), airlines rely on operating oputwith CAS for commercial reality and ATC units to cope with the day to day realities of avoiding unknown traffic outside CAS.
Sadly, SRG is predominantly staffed by people who last did operational controlling a in the equivilant of the last century, have have absolutely no idea of what it is like to operate as an ATCO or a pilot outside CAS.
Thank god for the sterling service of London Mil' , the vast majority of whose ATCOs know what the real world is all about, without them, we would be well and truely screwed...