A £3.2 million award for excellence in African leadership has failed to find a winner for a second year running

To win the Mo Ibrahim Prize, an African head of state must have been democratically elected, avoided corruption allegations while in office, and stood down at the end of their term or when they were voted out. It is the richest annually-awarded international prize. Mo Ibrahim, a British-Sudanese mobile phone billionaire, set up the award in 2007 to honor African heads of state who step down when they should, run democratic elections and safeguard their national exchequers from corruption. Winners are given £3.2 million spread over 10 years and then £130,000 a year for life to support them after they leave office.