David Cameron has warned voters that they have '11 days to save Britain', as he claimed Scottish nationalists 'don't want the country to succeed'. The Prime Minister said the Scottish National Party would prop up a minority Labour administration in the hope that the government would be a 'disaster' and bring forward its dream of independence. But Liberal Democrat Cabinet minster Danny Alexander accused the Prime Minister of 'playing with fire' by stirring up ill-feeling between Scotland and England in a way that would only fuel support for independence in next year's Scottish Parliament elections. Scroll down for video . David Cameron, addressing supporters in Somerset this afternoon, has warned voters that they have '11 days to save Britain', as he claimed Scottish nationalists 'don't want the country to succeed' The Prime Minister - taking a selfie with supporters today, said the Scottish National Party would prop up a minority Labour administration in the hope that the government would be a 'disaster' and bring forward its dream of independence . The warnings came as polls indicated that the General Election race was still neck and neck, with the UK heading for a hung parliament and coalition negotiations after May 7. A Survation poll put the Conservatives three points ahead on 33 per cent to Labour's 30 per cent. However, other polls had Labour nudging ahead. Today's Survation poll found that more than a third of English voters would not regard a Miliband administration propped up by the SNP as 'legitimate'. More than two-fifths - 44 per cent - meanwhile said that they would rather see England break away from Scotland than have an arrangement of this kind. Mr Cameron told the Sunday Express that an outright Conservative victory could make Britain 'one of the great international success stories of the next decade'. The Prime Minister echoed Tony Blair's 'education, education, education' slogan when he said his three top priorities would be 'economy, economy, economy'. But he warned: 'There are 11 days left to save the economy, to save jobs, effectively to save Britain.' A Survation poll has put the Conservatives three points ahead on 33 per cent to Labour's 30 per cent . Mr Cameron was interviewed on the Murnaghan programme, broadcast this morning, warning of the threat posed by the SNP . Mr Cameron said that the SNP 'want to achieve the break-up of our country, so therefore if you have a Labour government backed by the SNP, you have got a government backed by people who don't want the country to succeed. 'They don't want parliament to succeed. They don't want the government to succeed. They don't want the United Kingdom to succeed. That is really worrying.' Nicola Sturgeon and her predecessor Alex Salmond will want voters to look back after five years of a minority Labour adminstration made possible by the SNP and think 'that was a disaster, now can we break up the United Kingdom altogether?', said the Prime Minister. Mr Alexander was highly critical of the Conservatives' decision to focus their election campaign on the threat of Scottish nationalism. Ed Miliband, appearing on the BBC's Andrew Marr show this morning, insisted Labour would not do any deals with the SNP . The Labour leader is under growing pressure to rule out governing with the support of SNP MPs . The Lib Dem Chief Secretary to the Treasury told The Observer: 'I think the Tory campaign has been a total disgrace. I think they are deliberately trying to stir up ill-feeling between Scotland and England in a desperate attempt to fend off Ukip and I think it has long-term consequences. When you stoke tensions, you are playing with fire.' Mr Alexander added: 'I think a majority Tory government would be a disaster for the whole of the United Kingdom because it would lurch this country to the right economically ... but it would be a particular disaster in Scotland, because it would give the SNP what they most want . - a grievance to nurse for the Scottish parliamentary election in 2016.' And former Liberal leader Lord Steel told the paper: 'The truth is that a new Tory government dependent on Ukip sympathisers in their own midst is a greater threat to the unity of the UK than any band of SNP MPs.'
PM says a minority Labour administration would be propped up by the SNP .
Latest poll shows the Conservatives have nudged 3% ahead of Labour .
Mr Cameron said a Tory victory was needed 'effectively to save Britain'