Nicola Sturgeon took part in debate between leaders of Scottish parties . SNP spokesperson said she is ' offering to personally challenge Ed Miliband prime minister ' Her failure to rule out another referendum was met with criticism by audience . Added she did not support Conservative talks with SNP MPs .
Nicola Sturgeon took part in debate between leaders of Scottish parties . SNP leader said she is 'offering to help make Ed Miliband prime minister ' Her failure to rule out another referendum was met with boos by audience . Added she would not support Conservative government with SNP MPs .