A new "scramble for Africa" is taking place among the world's big powers, who are tapping into the continent for its oil and diamonds...Simon Taylor, director of Global Witness...said: "Western companies and banks have colluded in stripping Africa's resources. We need to track revenues from oil, mining and logging into national budgets to make sure that the money isn't siphoned off by corrupt officials." [refers to BG, HSBC, Elf, LIB, Standard Chartered]