Cameron calls on electors to vote tactically

David Cameron has urged people to vote for their “preferred Prime Minister” as he kicked off a final push to election day.

The Tory leader made a direct appeal for Ukip and Liberal Democrat supporters to cast their ballots tactically and keep him in Downing Street.

Mr Cameron insisted he is the “only option” for avoiding a “calamitous” and “chilling” tie-up between Ed Miliband and the SNP.

He warned that Ukip was a “back door to a Labour Government”, and suggested Nick Clegg was ready to be part of a “minority Labour Government, propped up by the SNP”.

The Conservatives have used their latest election broadcast to press home apocalyptic warnings about the threat of SNP influence.

In the film, the economy, represented by a clock, is smashed by a sledgehammer that represents the nationalists.