(Reuters) -Some of BP’s largest shareholders have urged the company to approach BAE Systems Chief Executive Charles Woodburn about becoming the British oil giant’s next boss, Sky News reported on Saturday, citing unidentified sources. Several large investors believe that BP should target the appointment of an external candidate as its CEO, according to the report. It is unclear whether Woodburn had been formally approached by BP, according to Sky, adding he had been sounded out in recent weeks. “Charles is chief executive of BAE Systems and we have no comment on BP personnel matters,” a BAE Sy…