I think the inclusion of "squadrons" that do no operate any form of "flying machine" (be it fixed wing, rotary or UAV), e.g. a "policing squadron", in the overall total of "RAF Squadrons" is merely a way of not making the statistics look as bad as they really are - the cupboard is pretty well bare these days!
Biggus - I completely agree. A further breakdown between front-line flying sqns and the rest would be good to see. Remove OCU/METS/AWC etc.. and see how the numbers compare between now and ten/twenty/thirty years ago.