Flipster,
Agreed - I would've thought to apply the H-C Review to the whole of the RAF fleets.
I believe none of them are classed as "Ageing Aircraft" that would/should require full electrical and fuel system surveys in civvy street. This in itself is an airworthiness failing as the reliability of electrical systems is widely known to decrease with age and the same with fuel and hyd seals.
I don't believe the MOD has even considered ageing aircraft maintenance.
Other than Typhoon and Astor - name a RAF fleet less than 15 years old?
Consideration should also be given to structural/corrosion needs and requirements.
As we all know - Nothing in aviation is cheap or simple.