Warner Bros. Studio Tour London - The Making of Harry Potter. Enter the world of Harry Potter™ when you’re in London at the Warner Bros. Studio Tour London. With convenient transportation from the city to the studio, this Harry Potter tour introduces you to all the details that went into the making of the magical movies, including film sets, props, costumes and special effects. Stand in the Great Hall, walk along Diagon Alley, see Dumbledore’s office and more. Select a departure time when booking. Book Special Offer ! Warner Bros. Studio Tour London - The Making of Harry Potter From $73.52.