REUTERS - BP Plc's handling of the Gulf of Mexico oil spill was expected to overshadow talks on Saturday between U.S. President Barack Obama and British Prime Minister David Cameron.
The two leaders will discuss the crisis against the backdrop of public anger and political pressure on both sides of the Atlantic over the spill, which has fouled coastlines, closed rich fishing grounds and battered BP's share price
BP has been the target
of stinging attacks by the White House and its share price has gyrated on London and New York stock exchanges this week. Obama administration officials have threatened to increase BP's liabilities for the spill.
Concerns about the London-based energy giant's future -- it faces a U.S. government criminal and civil investigation and the prospect of a slew of lawsuits and hefty fines -- prompted Cameron and his finance minister on Friday to defend the firm.
The British prime minister was quoted by a spokesman as saying after he spoke to BP Chairman Carl-Henric Svanberg that "it is in everyone's interests that BP continues to be a financially strong and stable company."
The backing sent the company's share price soaring seven percent in London.
Cameron, who took office in May, is due to speak to Obama by telephone call at 11 a.m. EDT (1500 GMT) on Saturday.
A Cameron spokeswoman said the call would be "statesmanlike and workmanlike." A White House official played down the BP focus, saying it would be just one of a number of issues raised.
The call will be a tricky test for the two leaders as both are under pressure to appear tough to voters at home.
Obama, criticized by some in the United States over his handling of the unfolding environmental and economic disaster that threatens lucrative fishing and tourist industries, has been seeking to direct public anger toward BP.
For his part, Cameron must show Britons that he is not caving in to pressure from his country's most powerful ally at a time when the two nations shoulder many common burdens and problems such as the bitter conflict in Afghanistan.
[BP] has been capturing oil from the well since installing a containment system last week, though the well will not be sealed until August, when two relief wells now being drilled are due to be completed.
How much oil?
It remains unclear how much oil is pouring into the Gulf, but U.S. scientists this week doubled their estimate of the flow to as much as 40,000 barrels per day, stoking the ire of environmentalists.
Bob Deans of the Natural Resources Defense Council, an environmental group, said he was shocked by the new estimates.
"We knew it was bad when BP was telling us 5,000 barrels a day. Now that we're up to as much as eight times that amount ... it's exponentially worse," Deans said outside a wildlife cleaning facility in Buras, Louisiana.
The new estimates could have huge financial implications because under the U.S. Clean Water Act, BP and others face fines up to $4,300 for every barrel of oil leaked.
BP expects the total bill for the clean-up of the spill, which has affected 120 miles (190 km) of U.S. coastline, will be $3-$6 billion, an analyst briefed by BP said in a research note on Friday.
The slick has fouled wildlife refuges in Louisiana, while tar balls have washed up on Florida's famous white beaches. One third of the Gulf's federal waters remain closed for fishing.