London is the city where the World Grand Prix ends in Pixar's Cars 2.
Cars 2 presents the World Grand Prix as a three-race international event. The opening race takes place in Tokyo, the second race is held in Porto Corsa, and the final race takes place in London. The London finale brings the racers and the spy plot together, with landmarks such as Big Ben appearing in the setting.
Lightning McQueen competes in the event, while Mater, Finn McMissile, and Holley Shiftwell uncover the conspiracy connected to Allinol. London is therefore both the location of the final competition and the setting for the story's climax. Porto Corsa is a fictional Italian coastal city created for the film, while Tokyo and London are real cities. The sequence of locations can be confused, but London is specifically the final stop rather than the first or second race.