52 % of Scots backing the SNP , doubling lead over Labour trailing on 24 % . Sturgeon buoyed by TV debates despite threat of another referendum . Damning survey comes on the day Miliband launches Labour manifesto . TNS surveyed one adults aged over 18 across Scotland between March 18 and April 8 .
52 % of Scots backing the SNP , doubling lead over Labour trailing on 24 % . Sturgeon buoyed by TV debates despite threat of another referendum . Damning survey comes on the day Miliband launches Labour manifesto . TNS surveyed 978 adults aged over 18 across Scotland between March 18 and April 8 .