Scotsman: VIDEO footage of oil gushing from a ruptured pipe more than a mile below the surface of the Gulf of Mexico has transfixed the world and for Tony Hayward, the chief executive of BP, every escaping barrel is blackening his name. He has been getting hate mail, constant calls from the US cabinet, including the secretary of the interior Ken Salazar. He is not sleeping well. "I will be judged by the response," said Hayward from BP’s control centre in Houston, as he acknowledged his career …