EMMA FARGE THE World Trade Organization's first female and first African director-general Ngozi Okonjo-Iweala began work today, ending a six-month leadership void at the global trade watchdog. After a long campaign that was derailed in the late stages by a Trump administration veto, the 66-year-old Nigerian was finally confirmed as boss last month, pledging to "forget business as usual" at the body which is struggling to strike new deals and whose arbitration functions are paralysed. "It feels great. I am coming into one of the most important institutions in the world and we have a lot of work to do.…