G-RICH is no muppet. Good points and much sense.
Yes there is a proposal being looked at by the CAA to allow flying training from un-licenced airfields. ( Which would mean no ATZ )
However with the amount of light aircraft that were using Coventry and hopefully will return then it would be wise to seek licenced status to keep the ATZ. Licenced airfield does not mean fully ATC is also required. Licenced airfields operate with a Air / Ground Radio.
I also have been victim of the CVT OPS yellow jacket brigade. In quiet periods they have been known to park near the maintenance hangars to have a go at personnel who are outside working even in areas where it would be impossible to knock them over as no vehicle could get near them. Also insisting everbody in a group wears a hi-viz vest. Using their logic why do not all passengers walking from a terminal to an aircraft wear one?
Looks like options for CVT as posted before are General Aviation / Maintenace in the short / medium term. Get costs under control and see what the future as the world recovers brings.