Gentlemen. I believe I have just figured out the answer to a long running question that has been troubling me.
I , like other interested parties, have been wondering what has happened to the McBeth's (Taboo to actually say GR4).
I think (due to the above "my grammar's bigger than your contest") that one day, an innocent liney looked at a GR4, and commented "this planes broken". In the mad rush that followed to point out that it was actually an aircraft, or that it had variable geometry , and not swing wings. That from then on, the ensuing natzi-spelling fest that followed, has ceased all repairs, or flying, or even mention of the GR-word, in case of a grammar or diction error.
(I have also come to realise that I may have far too much time free at the moment)
Barnstormer1968