Given the fragility of the economics and the apparently careful, not-too-ambitious approach being taken by this Sir Peter chappie, I wonder why they don't start with just AFISO. It would of course mean no radar and no instrument approaches, but perhaps they could get CAA approval for a company-only procedure e.g. for Atlantic if they wanted to come back in.
Failing that, having full ATC but without radar would also save a shed-load of money. Coventry IFR traffic could get a radar service from Birmingham or Brize until approaching the CT.
NS