elle may clampit (Yes, I remember watching the series when it was first broadcast!)
Or is that barking logical?
Whatever it may be, it is not practical! UK govts decided to take a
laissez faire approach (and were not stopped by anyone) for the last 30 years - the cost of changing to a 'managed' approach would now be astronomical.
Having encouraged regional airports, they now find that some have been very successful at the cost of the main hub. Some folks may have predicted it and others might say 'unintended consequences' but it is now an established process. It could be changed but only by a very considerable amount of our British Pounds and a political will that does not exist.