BP is expected to come under pressure at its annual meeting this week to explain how its decision to take a 20% stake in Russia's biggest oil company, Rosneft, will be affected by the country's standoff with the west over Crimea. BP's annual meeting, held at the ExCel centre in London's docklands on Thursday, could see questions from shareholders about Rosneft, continuing legal threats in the US and executive pay and environmental issues. The British oil group has already been drawn into the row over Russia's annexation of Crimea with calls for Rosneft's delisting from the London Stock Exchange. There is a risk that the Russian president, Vladimir Putin, could expropriate assets from western companies, including BP, said independent analyst Louise Cooper. BP's Rosneft stake accounts for a third of its production volume and gives it a stake in Arctic exploration. In addition, BP still operates under the cloud of the Deepwater Horizon disaster.