Kofi Annan, Bob Geldof and Nigeria's President Obasanjo are to sit on a panel set up to track aid promises made to Africa, Tony Blair is to announce. The UN secretary general will chair the panel, being set up a year after G8 pledges and a popular campaign pushed Africa up the international agenda. Backed by Bill Gates, the body will monitor issues such as debt and trade. Mr Blair will also warn against Africa slipping down the global priority list.