Science-fiction thriller JUMPER has landed at number one in the U.K. box office charts, knocking National Treasure: BOOK OF SECRETS into second place. The Hayden Christensen-starring film replicated its success in the U.S. by debuting at the top spot with takings of $6.12 million (GBP3.06 million). Nicolas Cage's National Treasure: Book Of Secrets slipped to number two with $2.9 million (GBP1.49 million), while Juno is at three with $2.68 million (GBP1.34 million). Children's film The Water Horse is in fourth place, and horror movie Cloverfield rounds out the top five in fifth position.