LONDON - David Cameron made his final appearance in Parliament as Britain's leader on Wednesday, turning the normally raucous prime minister's questions session into a time for praise, thanks, gentle ribbing, cheers--all spiced with a sprinkle of criticism. The warmth culminated in a standing ovation for Mr Cameron, 49, who is leaving office after voters rejected his advice and decided to leave the European Union. He will now formally tender his resignation to Queen Elizabeth II later in the day and hand over to his successor, Theresa May.''I will miss the roar of the crowd. I will miss the barbs of the opposition,'' Mr Cameron said, promising to watch future exchanges as a regular Conservative Party lawmaker on the back benches.