A strong performance by Farage's party could signal to Scotland that England may vote to leave the EU in a future in/out referendum.
Scottish First Minister says the ties between Scotland and England "are based instead on links of family and friendship that are facts of geography, not acts of parliament."
The former PM retains a strong connection with the working class Scots who could determine the referendum result.
Even younger SNP activists possess an evangelicalism that simply cannot be matched by Labour and the No camp.
The latest TNS survey suggests that the race is not narrowing at the rate the nationalists need to win.
The more radical the Yes campaign’s message becomes, the more likely it is to triumph in September.
The No side's average poll lead has fallen from 24 points in November to eight today. But the odds remain against the SNP.
Better Together head gives tetchy interview after new Scottish independence poll confirms the gap has narrowed to just five points.
The Labour leader uses the Scottish First Minister's weapon of choice against him.