The latest polls have shown a rise in support for the SNP of eight percent from the 2005 General Election.
SNP Depute Leader Nicola Sturgeon said:
"This is a very strong showing from the SNP as the only party to gain ground in Scotland from the last Westminster election. SNP support is up 8 points as all the London parties see their vote fall. "Voters are turning away from the 2 main UK parties and choosing a positive alternative - in Scotland this poll demonstrates that alternative is the SNP.
"While the Lib Dem's may fool voters in England that support is not being replicated in Scotland because people have a more credible and attractive alternative to the failed Westminster parties.
"Despite their high profile in the TV debates Labour, the Lib Dems and the Tories are down on the 2005 election as Scottish voters turn against the Westminster machine and in favour of local and national champions.
We will show that in a balanced Parliament it is only a vote for the SNP that will put Scotland's interests on the Westminster agenda."