Rich countries have so far given only one-seventh of the extra aid they promised to Africa three years ago, with France particularly off-track, according to a report published on Wednesday.

The G8 group of industrialised countries in 2005 promised to increase their combined aid to Africa to $50bn a year by 2010. But so far they have provided only $3bn of the extra $22bn required to meet the target, said DATA, the aid campaign group supported by rockstars Bob Geldof and Bono.