The thinking has been done, but, quite rightly, the Gov isn't going to waste time and money on the subject until they know it's needed. SNP can make all the claims they like about Defence, currency, etc, but there is no policy as yet, just empty promises by Mr S.
https://www.gov.uk/government/upload...aper-FINAL.pdf
http://henryjacksonsociety.org/wp-co...rt-LOW-RES.pdf