A general view shows the stores that line Diagon Alley during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
A model of a sculpture from the 'Yule Ball' during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
A general view of the Great Hall during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
The door to the Chamber of Secrets during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
Models of the teaching staff of Hogwarts School of Witchcraft and Wizardry stand on the stage in the Great Hall during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
The giant spider displayed during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
A cameraman filming a scale model of Hogwarts School of Witchcraft and Wizardry during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
Hagrid's Hut just outside Hogwarts School of Witchcraft and Wizardry during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
A general vew shows the headmaster's office at the Hogwarts School of Witchcraft and Wizardry during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
The Gryffindor Common Room at Hogwarts during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
A potions classroom during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
Rubber masks of the goblins at Gringotts Wizarding Bank are displayed during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
Death Eater costumes are displayed during a preview of the Warner Bros Harry Potter studio tour "The Making of Harry Potter" in north London on March 26, 2012. Photo courtesy: AFP
