In return, Exxon offers Rosneft participation in American and Canadian projects, notably the Hibernia petroliferous province in Canada's territorial waters nearly 200 miles south-east of Newfoundland and Labrador islands. Its reserves are estimated at 1-1.3 billion barrels (136-178 million tons) of oil. Exxon has a 33.1pc stake in the project. On September 13, Rosneft president Eduard Khudainatov announced that the companies would have a detailed plan in place for the joint projects before the end of the year. That same day, the Tyumen state arbitration court, on a petition from Rosneft, revoked its ruling authorising the removal of documents from BP's Moscow office. This happened the day after the British Prime Minister David Cameron and a delegation of British businessmen, including BP's chief executive Robert Dudley, visited Moscow. The raids were raised by David Cameron at a meeting with Russian President Dmitry Medvedev, but no conclusions on the matter were reached.