LONDON — Britain's leaders faced new pressure Saturday to explain any role they might have had in the release of the Lockerbie bomber after Libya's leader Moammar Gadhafi credited senior officials and members of the royal family for influencing the decision. Britain has condemned the scenes of jubilation in Tripoli at the return of Abdel Baset al-Megrahi and has considered canceling a royal visit to Libya as a sign of displeasure. But opposition leaders say comments from Gadhafi's son – who said the release was often brought up during trade talks – should be examined. "It is very important, I think, for the reputation of our institutions of justice that it is made clear beyond any doubt that this was not connected with some political trade," David Lidington, the Conservative Party's spokesman on foreign affairs, told the BBC. Thousands of young men greeted al-Megrahi's plane at a Tripoli airport Thursday night after he was released from a Scottish prison on compassionate grounds.