How long does it take to visit Harry Potter Studio in London?

I graduated from junior high school after Warner Bros.' Harry Potter studio opened last year. When I saw everything in the magical world in the movie before my eyes, I probably did nothing but marvel. Harry Potter Studio is located in the suburb of London. It takes 20 minutes by train from London. There is a direct bus to Harry Potter Studio after the train station, and it costs 2 pounds to go back and forth. I have to say how popular Harry Potter is, even taking the bus has to wait in line for a long time. Tickets for Studio need to be reserved in official website, which costs 28 pounds for adults, and there are no student tickets. Make an appointment in advance. When you arrive, you must change tickets on the machine. You can go in by changing your ticket. It takes a day for the whole travel network to eliminate all appearance factors.