Catherine, Duchess of Cambridge, and Prince William leave Westminster Hall after a Diamond Jubilee Luncheon during the carriage procession in London on June 5, 2012. Britain's Queen Elizabeth II on wraps up four days of diamond jubilee celebrations and festivities will conclude with a ceremonial carriage procession in London, a formal contrast to the spectacular pop tribute staged outside Buckingham Palace the day before. AFP PHOTO / POOL / PETER BYRNE