At this point in the discussion perhaps someone from the CAA could step in and give some pointers as to a likely route to success.
They would surely know the impossible and the possible, and the ajenda's hidden or open, of the other European states, for it is they, (the other European states) who will be required to agree to what ever is finally proposed.
I hope they,(the CAA) are interested enough in aviation to be Pprune readers.