SNP leader says she is not planning second referendum 'at this stage ' Forced to deny her Ukip will wreak havoc in Westminster after the election . Cameron warns Labour already punishing areas where they have no seats . SNP holding Labour to ransom means rest of UK 'would n't get a look in ' Cameron urges tactical voting from MPs and Lib Dems to block Labour .
SNP leader says she is not planning second referendum 'at this stage ' Forced to deny her MPs will wreak havoc in Westminster after the election . Cameron warns Labour already punishing areas where they have no seats . SNP holding Labour to ransom means rest of UK 'would n't get a look in ' Cameron urges tactical voting from Ukip and Lib Dems to block Labour .