The SNP’s exponential rise is throwing the British system of government into turmoil

The General Election of 2015 looks set to be an exceptionally good one for the SNP, who look set to not only supplant Labour as the largest party north of the border, but to rout it. Sean Swan argues that this could see considerable change in the way British politics is conducted in future, particularly given their possible involvement in any minority or coalition government emerging from the election.