Indian Prime Minister Manmohan Singh presently on a visit to London for the G-20 summit called on British Prime Minister Gordon Brown at 10, Downing Street on Wednesday. Observers have viewed the parleys between the two premiers as significant since they met on the eve of the G-20 summit that will deliberate on the ways and means to rescue the global economy. The global melt down experienced over the past one year has been the worst financial crisis since the 1930s.