By Lars Mucklejohn Several major investors in BP have reportedly urged the oil and gas giant to approach Charles Woodburn, boss of defence firm BAE Systems, about becoming its next chief executive. BP, which is the FTSE 100’s fifth-largest firm by market capitalisation, is currently looking for a new CEO after Bernard Looney was forced to reign in September due to a lack of transparency over previous relationships with colleagues. A number of major shareholders believe BP should consider appointing the first external CEO in its 114-year history, Sky News reported. One unnamed investor told the…