article_snippet.sent: John Major said the SNP would break the SNP pledge not to hold another referendum 'for a generation'.
article_snippet.sent: John Major said the SNP were 'determined to prise apart the United Kingdom'.
article_snippet.sent: Ed Miliband cited Conservative former Cabinet minister Lord Forsyth who has warned that the party's tactic of targeting a Labour-SNP link-up was 'short-term and dangerous' and could ultimately damage the Union.
article_snippet.sent: With the opinion polls pointing to a hung parliament with the SNP holding the balance of power as the third largest party, the threat of a nationalist link-up with Labour has emerged as the main Conservative line of attack in the election campaign.
article_snippet.sent: The tactic has caused misgivings among some Tories.
article_snippet.sent: Lord Forsyth - who served as Scottish secretary in Sir John's government - warned that building up the SNP to undermine support for Labour in England could ultimately damage the Scottish Trade Union Congress. '
article_snippet.sent: We've had the dilemma for Conservatives, which is Conservatives want to be the largest party at Westminster and therefore some see the fact that the nationalists are going to take seats in Scotland will be helpful,' Lord Forsyth - who served as Scottish secretary in Sir John's government - told the Guardian. '
article_snippet.sent: Lord Forsyth - who served as Scottish secretary in Sir John's government - said Mr Cameron's call for 'English votes for English laws' in the aftermath of last year's Scottish independence referendum vote had 'shattered the unionist alliance against the break-up of the United Kingdom'.
highlights_snippet.sent: John Major said the SNP were 'waiting for a good excuse' for a second poll .