LO, not so. The main bases, after dispersal, became 4-ac dispersals in their own right. They might also have housed spare weapons and been recovering lame ducks.
I grant that the main bases were inside the ring of steel so the main threat was missiles and not bombers.
There is also the question of whether the targets would have been counter-value - Birmingham, Manchester, Lincoln, or counter-force - Ballykelly, Machrahanish, Valley, Brawdy etc etc ie no hiding place.
I always thought that the air defence exercises, defending the radar sites, were all a waste of time as there was never a realistic conventional bombing attack so far from the IGB. Much better lob a few missiles over the top.
Probably a case of we will practise defence that we can and ignore defence that we can't and s*d reality.