Some SNP officials fear that the estimated 180,000 SNP voters who voted against independence in the referendum, but would back the party on day-to-day issues as Scotland's champion in the UK, would support other parties if independence was back on the election agenda.
Related: Miliband: I won't have Labour government if it means SNP deal Aside from one and a half debates, stage-managed to the point of absolute stiltedness, the party leaders have shown such a terminal unwillingness to be seen in each other's company that I've started to develop three key theories about them.
Meanwhile Cameron and his media allies have made the "SNP veto" a major theme of their campaign to motivate disgruntled English voters.
Scotland's 56 SNP MPs will certainly seek to amend the legislation to ensure that young people are able to take part in the vote".
He was one of the founders of the United Federation of Teachers.
"If you want to stop Ed Miliband and the SNP from getting into power and wrecking our economy... and if you want me back on work on Friday working through our long-term economic plan as your prime minister then it is vital that you vote Conservative," Cameron said.
A Labour source said that, given teenagers have a "tremendous vested interest in whether or not we stay in the EU or leave", there could be a strong appetite for amending the EU referendum bill in the Lords, even if Labour and the SNP fail to recruit the relatively small number of Tory rebels they would need to defeat the government in the Commons.
As she left, the SNP leader said the decision was up to the people of Scotland, then joked with photographers as they begged for one more shot of her alone.
There was similar scenes moments later in Ballieston, Glasgow East, where Sturgeon cast her vote with her husband and SNP chief executive, Peter Murrell.
Most new SNP MPs will be inexperienced, not all will love or want to follow the wily Alex Salmond.
In a later Ask Farage programme on the BBC, the Ukip leader Nigel Farage said the rise of SNP shows Ukip could thrive even if Britain voted to stay in EU.
