Royal Dutch Shell has been quietly working with Iraq’s oil ministry over the past two years, advising it on how to increase the production of two oilfields. Under an agreement struck after the 2003 invasion, no one from the company, Europe’s largest oil group, has set foot in the troubled country; instead, monthly face-to-face meetings with the oil ministry have been held in Amman, the Jordanian capital, and weekly contact has been maintained by video-link.