Gordon Brown has called for a truly global consensus on how to deal with the global financial and economic crisis at the London Summit next Thursday.

Speaking at a university in Saõ Paulo during the last stage of his pre-G20 tour, the UK Prime Minister called on world leaders to 'seize this time of profound change to forge for our generation a new internationalism, a new era of international cooperation that is both hard-headed and progressive.'

Brazil and its neighbours had 'a crucial role to play' in solving the problems facing the global economy, he added. 'With 70 per cent of world economic growth coming not from the older industrialised nations but now coming from the emerging and developing countries, there must be a new deal that includes every country and every continent.'

Mr Brown repeated his call for the G20 to create a pool of finance of around $100bn to address the global shortfall in trade finance. He also set out his hopes for longer-term reforms of the international financial architecture to meet the new realities. 'The next head of the World Bank need not be an American. The next head of the International Monetary Fund need not be a European. We must make the governance systems of the World Bank and the International Monetary Fund more transparent, more relevant and more open.'

The UK Prime Minister ended his three-continent journey in Chile on Friday, where he was scheduled to speak at a Progressive Governance Conference in Santiago. Hosted by Chilean President Michelle Bachelet, the conference brings together leading international politicians to discuss future political trends after the global crisis. Mr Brown has met the Chilean President and will meet other world leaders before his return to the UK.

Meanwhile the head of the International Monetary Fund, urged world leaders to end the London Summit with an agreement on a platform of six key reforms needed to deliver economic recovery. In a press conference streamed on the internet between Paris, Washington and London, Dominique Strauss-Kahn said the meeting had been 'well prepared and that the preparation should make it possible for the meeting to be a success.'

He outlined his six priorities as:

• Most importantly, fixing the financial sector and cleaning the balance sheets of the banks as fiscal stimulus is not likely to be successful without ‘cleansing’ the banking system;
• While the fiscal stimulus in 2009 was roughly in line with the IMF's target 2 per cent of GDP, countries should make sure that more was available for 2010 'if needed';
• Further resources for the IMF to ensure that emerging market countries on the periphery are not hit by the massive falls in capital flows;
• Approval for the doubling of concessional loans from the IMF to low-income countries that have been by the slump in exports and commodity prices;
• Approval for the IMF’s overhaul of the fund’s lending framework; and
• Agreement on regulatory reform for the banking sector, tax havens, credit ratings agencies and hedge funds.

He acknowledged governments needed to think of the implications for the medium term of the actions they were taking now but added: 'The risk of doing nothing is bigger than the risk of moving.'

In the UK, Lord Malloch-Brown, UK Minister for Africa, Asia and the UN, said that while the world economy would not recover overnight after the London Summit, he hoped it would be seen as the place where the world’s leaders demonstrated confidence in the future which helped restore confidence more widely.

Speaking in a wide-ranging webchat from No.10 Downing Street, Lord Malloch-Brown said the G20 represented an opportunity to ensure the burdens of recovery were fairly shared. 'Everybody recognises that they need to increase their domestic demand and contribute to global recovery.'

He also said he expected countries to recommit to their Gleneagles pledges on development assistance. 'We've had a lot of consultations with African, Asian, Latin American and other leaders and stakeholders who are not at the summit. Their number one concern has been maintaining global free trade. And second, that the G20 not come up with closed solutions which leave them out. Many of them don’t have the economic independence to adopt a fiscal stimulus on their own, so they are looking to the G20 to support more resources for the international financial institutions, in order to provide them that assistance.'