-longer-ron
The glider industry is a small one and the manufacturers are not able to deliver large quantities of aircraft, I would guess 5-7 a year is the delivery rate on new gliders is the best the RAF could expect.
The problem is the surge in demand can’t be met without increasing staff, training those staff, blocking orders from other customers and paying large EU redundancy packages to those workers you lay off at the end of the production surge.
So as a business proposal it’s not a very good one, not surprising that the manufacturers are staying away in droves!