US President George W Bush has said the United States and Britain are working on a proposal for the Group of Eight summit next month that would eliminate 100% of debt for developing nations.

He was addressing a joint media conference with the visiting British Prime Minister, Tony Blair, who wants the G8 countries to adopt a multi-billion ten-year aid plan for Africa at their summit in Scotland next month.

Mr Bush also announced that the United States would contribute another $674m toward humanitarian assistance in Africa.

The United States has already dismissed British Chancellor Gordon Brown's plan to write off the developing world's debt and mobilise more aid. 

However, the White House said the two leaders would announce a joint British-US initiative aimed at feeding the hungry in Ethiopia, Eritrea and other African nations threatened by famine.

Tony Blair is visiting several G8 countries to try to secure a consensus on international aid, as well as measures to tackle climate change, ahead of the summit.