Gordon Brown has confirmed a 200 billion (£178 billion) stimulus package across the EU.
He presented the package as a flat rebuttal of continuing tension between Germany and Britain.
"The EU is fully united at supporting the measures," he said.
"This coordinated action will make this a good outcome for Britain."
But the prime minister also used the deal to attack the Conservative's economic policy, even if he did not mention them by name.
"When next month the new president takes office [in the US], we'll be able to work together and show Europe and America can make changes to benefit the economy," he said.
"We're united in our belief governments have a duty to act. We will not stand by and let the recession take its course."