Bono has hit out at claims his friendship with US President George W Bush damages his work as a charity campaigner.

Critics claim the singer would achieve more by attacking the Bush regime - but the Irishman maintains his achievements prove his tactics have worked, and insists he never lets Bush get off lightly.

Bono says, "We have had lots of rows and we have denounced the Bush administration when they have made mistakes, but we're not placarding and throwing rotten tomatoes at people who are trebling our aid to Africa."