Ibe Kachikwu, head of the Nigerian National Petroleum Corporation (NNPC), is taking no prisoners as he forges ahead with implementing the anti-graft policies of President Muhammadu Buhari.
Making mark: new NNPC boss Emmanuel Kachikwu
Iain Esau in London
Published 28 August 2015, 13:15Updated 17 October 2016, 12:22