British Prime Minister Gordon Brown sees off U.S. President Barack Obama at 10 Downing Street on April 1, after they held talks preparing for the following day's Group of 20 (G20) summit meeting in London.

The London summit, as a follow-up to a meeting last November in Washington, D.C., brought together leaders of the G20 and representatives of international organizations and financial institutions to work cooperatively to restore financial market stability and stimulate global economic growth.