I think that it is about time that as many GA pilots as possible started to plan flights though these Class D zones that are springing up and when refused access put in a complaint to the CAA. I have no major objection to the establishment of CAS where there is free and equitable access for all airspace users. Where the service provider is unable to accommodate traffic then they are failing in their obligations to the CAA to run airspace and should thus be reported accordingly.
Its time for GA and non-commercial airspace users to start making noises - in much the same way that NATS have started their enhanced airspace infringement reporting process.