The whole thing with going after Libya over lockerbie imho was becuase they couldnt punnish the PLO directly...so they went to the guy who gave them safe harbor as well as political and economic backing and punnished him instead.
And I don't and perhaps will never know what exact role BP has played in it. The story hasn't seen the light of day since the commission went dark, which tells me the respected governments involved have come to an agreeement, or the aggreement BP worked out has now been ruber stamped by them eaither way.