Under what circumstances, if at all, would the SNP government move to open defiance of Westminster?

Question 4: Under what circumstances, if at all, would the SNP government move to open defiance of Westminster? On Twitter you meet all sorts: English nationalists fixated on Magna Carta and the Bill of Rights. Scottish nationalists dreaming of the proclamation of the Provision Government in 1916 or the Lithuanian Supreme Soviet declaring in 1990 […] Source