Guardian: BP chief executive Tony Hayward will tell US politicians today that he is “deeply sorry” that the Deepwater Horizon oil rig exploded in the Gulf of Mexico, and admit that the disaster should never have happened. In his opening remarks to a congressional committee, Hayward will speak about the sadness he feels about the ongoing environmental disaster, in which 11 oil workers were killed. He will also pledge that BP will repair the damage caused by the huge, ongoing oil leak, and learn …