617 Sqn has already practiced 'austere dispersed ops' back in June when it landed and operated from Pantelleria and refuelled on the ground from an Italian AF KC-130J.
All this talk of using military bases and protection against multi warheaded ICBM's rather ignores what CAS actually SAID in his statement! Dispersed operations to protect against a possible hypersonic/supersonic cruise missile threat by no notice dispersal exercises to CIVIL airfields.