Sir John Major: SNP 'a recipe for mayhem'
Former Prime Minister Sir John Major has weighed into the election debate with a warning about what he says are the dangers of a Labour government being propped up by the SNP.
He said an Ed Miliband government would be subjected to a "daily dose of blackmail" by the nationalists, and that would be a "recipe for mayhem".
But the Labour leader accused the Tories of threatening the integrity of the UK.
James Landale reports.