Better Together Leader Alistair Darling Visits Walker Precision Engineering

GLASGOW, SCOTLAND - APRIL 14: Alistair Darling leader of Better Together and former Chancellor of the Exchequer visits Walker Precision Engineering on April 14, 2014 in Glasgow, Scotland. A referendum on whether Scotland should be an independent country will take place on September 18, 2014. (Photo by Jeff J Mitchell/Getty Images)