He added: "During the referendum Scotland was divided between Yes or No. But in the general election most Scots will be united in wanting to get David Cameron out of Downing Street. The choice Scots will face next year is between sending SNP MPs to the House of Commons to protest against the Tories, or Scottish Labour MPs who will remove the Tories. Voting SNP or Green in 2015 could accidentally keep the Tories in power."