I cannot believe that John Anderson's (how many transport minsters ago was that, 10?) Ministerial Directive to placate he who cannot be named, over 15 years ago, is still being trotted out to justify the refusal or windback of Class C above D. How about we move on, people!
"As an aside, folks, just to let you know that we will be descending into airspace where not only do VFR aeroplanes not advise us of their position, they probably cannot be seen by air traffic controllers either because there's no radar out here. My FO and I will do our darndest to spot them out the front windows because there is a law that says we must, but I can't promise anything, because, as you can imagine, it gets a bit busy up here as we approach terra-firma.".