More than 100 business leaders have declared their support for the Conservatives, warning a "change of course" after the general election would "put the recovery at risk".
Senior executives from leading British companies - including five who have previously backed Labour - signed an open letter praising the Conservative's economic policies.
Labour dismissed the letter as "nothing new".
Chancellor George Osborne has told workers today that there are "just 36 days left to save Britain's economic recovery" and said his party are the ones to deliver a stable course of action for dealing with the country's finances.
Citing a letter published in The Telegraph today, which backed the Conservative's economic plans and was signed by more than 100 business leaders, he said the Tories had shown they were making a difference.
He said: "You can see we're providing businesses and families with the bedrock of economic stability that comes when you're dealing with your debts and you've got a clear plan."
He added: "No more ifs or buts. Britain now knows. Vote for Ed Miliband and Ed Balls on May 7 and jobs and investment and economic security will be at risk. We have just 36 days left to save Britain's economic recovery."
More than 100 people claiming to represent working people across Britain have signed a letter backing Labour in the general election.
Tories take campaign to the factories of three businesses who publicly endorsed their economic plans.
Read the letter carefully, don't worry, it's short. Note that while it praises the Conservative-led government it does not mention Labour.