Aid worker Marcus Prior travelled with the World Food Programme (WFP) to visit the Darfur refugees:

In the absence of television, thank heavens for my satellite radio - live commentary on England versus Portugal in the Euro 2004 quarter-finals. Whoever coined the phrase "it's a small world" got it wrong. Tonight, miles from anywhere, the world feels bigger than ever.

Sudan's desert, with its golden sand streaked with red, broken only by the odd village, would be breathtaking were it not for the dark shadow of human rights abuses that hangs over it.

I went to visit a small, inadequate shelter that had become home to a mother and her four children. The eldest is clearly severely mentally ill. As we talked, she stopped to reach for a small plastic bowl filled with water and poured some of it into a cup. It was all she had - but with the temperature at over 45C, she offered it to us. It was hard to know which way to look.