France's first lady Carla Bruni and Sarah Brown (R), the wife of Britain's Prime Minister Gordon Brown, attend a charity lunch, in aid of the White Ribbon Alliance for Safe Motherhood, hosted by Sarah Brown, at Lancaster House in London March 27, 2008. French President Nicolas Sarkozy and Prime Minister Brown, on the second day of a state visit, called on Thursday for banks to declare the full extent of the damage to their operations caused by the credit crunch. REUTERS/Luke MacGregor (BRITAIN)