Whowhenwhy - the aircraft in the hangar at Cott were not worn out from Afgahnistan -if anything the experience updated and prolonged the fleet.
A small number of aircraft in the hangar you saw were stored but some of these machines were not continued with on the Jump line because of the withdrawl of aircraft from the fleet last year.
People are quick to spout utter nonsence about how the aircraft were worn out -nothing could be further from the truth -some of the machines having done sub 3000 hrs -lower than the GR.3s that they replaced .