In his annual speech at the Lord Mayor's Banquet, Brown -- who has spearheaded calls for the reform of international financial institutions -- will say Britain, the United States and Europe are key to forging a new world order.

"The alliance between Britain and the U.S. -- and more broadly between Europe and the U.S. -- can and must provide leadership, not in order to make the rules ourselves, but to lead the global effort to build a stronger and more just international order," an excerpt from the speech says.

"Uniquely in this global age, it is now in our power to come together so that 2008 is remembered not just for the failure of a financial crash that engulfed the world but for the resilience and optimism with which we faced the storm, endured it and prevailed," Brown will say in his speech on Monday evening. "...And if we learn from our experience of turning unity of purpose into unity of action, we can together seize this moment of change in our world to create a truly global society."

Brown will also identify five stages for tackling the economy, starting with recapitalising banks so they can resume lending to families and businesses, and better international co-ordination of fiscal and monetary policy.