It is a tragedy that the party that has ruined Zimbabwe, led by a man who was one of the chief perpetrators of its misery, has managed by hook or by crook to win a fresh mandate. The narrow margin of 0.8 per cent by which Emmerson Mnangagwa secured his victory in last week’s presidential contest will inevitably raise suspicions of foul play. But he will almost certainly be given the benefit of the doubt, not least by the British government. Mnangagwa, known as the Crocodile for his habit of biding his time and crunching his enemies as Robert Mugabe’s chief enforcer and election-rigger, has said some sensible things since overthrowing his mentor on the back of a military coup last November. But he did not deserve the enthusiastic support of the Foreign Office.