of the board remember speaking out warning voters a yes vote for independence would cause so much confusion it would put the economy at risk. on thursday, rbs, klyce dale joined loids, standard bank and hsbc saying they plan to move their registered head offices to the uk if scotland becomes independent. the uncertainty is also causing concern for one of scotland's most iconic industries and some of its biggest exports. what an independent scotland could mean for makers of scotch. ♪ >> this is scotland's second biggest export. it brings in almost $7 billion a year. and 40 bottles of the stuff are estimated abroad every second. >> scotch whiskey is an international icon for scotland. it's a product of great history and authenticity and great taste. you'll find a scotch whiskey for