Bill Gates praises UK on Africa

The UK government is an important "change agent" to keep Africa on the international agenda, according to Microsoft boss Bill Gates.
Tony Blair and Gordon Brown had managed to get the continent's plight on the agenda of world leaders, he said.
Gavi, an aid organisation sponsored by Mr Gates, announced on Friday that its vaccination programme had so far saved the lives of 2.3m children in Africa.
Mr Gates told the BBC this proved that aid programmes could deliver success.
Not everything had gone well, he admitted, but overall the programme had met its targets.