Guardian: BP boss Tony Hayward will next week launch a fight back against the wave of criticism that has engulfed him and BP following the Gulf of Mexico oil spill. Hayward is set to outline a new corporate growth strategy in a bid to reassure shareholders and, at the same time, cement his position as chief executive. His move comes as pension funds in New York and Ohio unveiled plans to sue BP for “securities fraud” as a result of the oil company’s allegedly misleading comments on its ability …