What impact could this UK election have on Scottish independence?

From bbc.com

When Scotland declared its independence from England, the words came from the heart. "It is in truth not for glory, nor riches, nor honours that we are fighting, but for freedom alone, which no honest man gives up but with life itself." Seven centuries have passed since the Declaration of Arbroath, and Scottish nationalism now strikes a rather different tone. "We are a moderate left-of-centre party in the mainstream of Scottish public opinion," said the Scottish National Party (SNP) leader, John Swinney, as he unveiled his party's manifesto for the general election. Independence, he said, can deliver "a stronger ... (full story)