Next week's G20 meeting must address the global financial system to ensure the world won't experience a repeat of the collapse that led to the current downturn. Finance ministers and central bankers from the Group of 20 developed and developing nations will meet on September 4 and 5 in London to discuss and develop ways to rebalance the global economy. British Prime Minister Gordon Brown said finding "future sources of growth" beyond the buying power of US consumers would feature high on the agenda. Less of a priority will be currency issues, with leaders less concerned about the appreciation of China's yuan as countries look to build foreign exchange reserves to buffer themselves from fluctuations in capital flows.