I seem to recall that when I was at Yatesbury on my fitter's course we had several nationalities under training. The Iranian uniforms were especially colourful. Most of this type of training of groundcrew and aircrew, ceased when they countries involved were asked to bear the full (MOD arithmetic !) costs, as there had been a degree of subsidy before. I always thought this to be short sighted as today's trainee could well be tomorrow's senior officer.