NEW : Britain is not in that group . David Cameron says the United States will learn from Obama on deficit reduction . He tells Amanpour he has no hesitation over promising a referendum . He says the G8 will focus on free trade , fairer taxes and greater transparency '' We will be the power that eradicates absolute poverty in our world , '' he says .
NEW : David Cameron says the United States will learn from Obama on deficit reduction . He tells Amanpour he has no hesitation over promising a referendum . He says the G8 will focus on free trade , fairer taxes and greater transparency '' We will be the power that eradicates absolute poverty in our world , '' he says .