Most RAFRes reservists called out for GW2 were in those trades which had been over-civilianised in the first place.
They were expected to back-fill domestic posts, to allow their regular colleagues to deploy.
Whereas the RAuxAF were expected to deploy.
But it was never thought that Bliar's adventurism would still be going on some 5 years later, nor that such reliance on reserve forces would still be needed.