Renegade General Khalifa Haftar stole the show at the weekend as a summit of world powers, including the US, the EU and key sponsors of the Libyan civil war, convened in Berlin in an effort to restore peace.

Haftar brought oil exports from Libya almost to a complete halt by blocking major ports and forcing the closure of its largest oilfields.

Oil output is plummeting towards 70,000 barrels per day compared with an earlier average of 1.2