This is a point you have tried to argue before. Everyone agrees that VGS are not RAF Aircrew, but they are RAFAC Aircrew. Do you believe that a BA 747 captain is not ‘aircrew’ because they have not been through that RAF training syllabus, or that the pilot of a light aircraft is not ‘aircrew’ and therefore can’t go in to ‘aircrew only’ areas at airfields?
What someone has in their mind as being a valid use of the term ‘aircrew’ is not what is at debate here - it’s which CFAV wear aircrew rank slides.