British Prime Minister David Cameron has warned against "the destruction" of BP as its shares plummeted close to a 14-year low amid the battle against the Gulf of Mexico oil spill. The new British leader, who will hold his first bilateral talks US President Barack Obama today, said it was important for transparency over the British company's liability in the catastrophe. <br/>BP has increasingly come under fire from the US administration for triggering the country's worst ever environmental disaster when a BP-leased rig exploded in the Gulf in April. Despite desperate efforts, BP is still not capping all of the estimated 35,000 to 60,000 barrels of oil spilling into the sea every day. The British energy giant said it had spent 2.35 billion dollars on compensation and clean-up costs as the giant slick washes up on the southern US coast. But the final costs are likely to be even higher, with BP already having agreed to pay 20 billion dollars into a compensation fund over the next five years. Obama has vowed to hold BP accountable for the spill. Cameron said the oil spill was "heartbreaking to see," but vowed that BP would clean up the spill and compensate those affected. <br/>