Guardian: BP has come under further pressure after one of its partners said the oil giant should foot the entire bill for the damage caused by the Gulf of Mexico spill. Anadarko Petroleum, which owns a quarter of the ruptured Deepwater Horizon well, refused to accept any blame for the explosion that killed 11 workers and led to the US’s worst environmental disaster. The company’s chairman and chief executive, Jim Hackett, said in a statement BP’s actions probably amounted to “gross …