Earlier quoted context omitted.
what do you mean allowed? if the UK wished to retain the bases it would make retaining the land a condition for granting independence, similar to Cyprus this isn't like Article 50 where after 2 years you're out: the nationalists only method to get what they want is by agreeing to Westminster's requiements, in full otherwise Scotland continues to remain part of UK
There is absolutely no way any Scottish government could agree to a long term presence on the Clyde.
the nationalists have absolutely no leverage over the UK
if you thought the Brexit negotiations were one sided: you've seen nothing yet