Gamesmakers and spectators head along the Mall toward Buckingham Palace at the end of a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London. Photo courtesy: AFP

British Prime Minister David Cameron addressing athletes and spectators from the Queen Victoria Memorial outside Buckingham Palace at the end of a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London. Photo courtesy: AFP

People line Fleet Street to watch a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London Photo courtesy: AFP

Floats progressing down the Mall toward Buckigham Palace at the end of a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London. Photo courtesy: AFP

Aerial view of a line of floats and people crowding the streets for a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London. Photo courtesy: AFP

Aerial view of a line of floats and people crowding the streets for a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London. Photo courtesy: AFP

British Royal Air Force Typhoon aircraft escort an E3D Sentry (C) during a flypast at the end of a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London. Photo courtesy: AFP

Spectators line streets to watch a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London. Photo courtesy: AFP

Olympians at a ceremony following a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London. Photo courtesy: AFP

British Airways Airbus aircraft that brought the Olympic Flame to Britain flies over the Queen Victoria Memorial at Buckingham Palace as part of a parade celebrating Britain's athletes who competed in the London 2012 Olympic and Paralympic Games in central London. Photo courtesy: AFP