SH,
Some concerns valid. But others overplayed.
In your opinion.
I can also relate concerns of US carriers of European/UK ATC that I can portray as overplayed. However, when we come across this we don't just tell them they're wrong and that the USA doesn't do things right. We sit down with them and discuss the concerns, explain why we do things the way we do, the limitations we are faced with (which tangentially are far different for a purely commerical and independent entity with capped income such as NATS, than for a Federal Agency such as the FAA), and we both come out of the room with a far greater understand of each other's worlds.
Essentially NATS looks after huge volumes of Class A airspace on behalf of the UK CAA according the the En Route licence
There, I corrected it for you.
Yes, as I keep saying, if you want VFR access to areas that are currently Class A, you need to lobby the CAA and/or EASA, to change the rules. Failing that, you need to submit an ACP to the CAA.
On here and in other fora you yourself are constantly negative towards NATS. You still have yet to understand that NATS operates under the rules and airspace set by the CAA.