Visiting the Harry Potter Studio Tour in London is a magical experience for fans of the series. As of my last knowledge update in September 2021, here's the information you need about tickets, hours, costs, and more. Please note that this information might have changed, so it's a good idea to verify details on the official website before planning your visit.

1. Tickets: Tickets for the Harry Potter Studio Tour should be purchased in advance, as they often sell out quickly. You can purchase tickets from the official website. Different ticket types may be available, including standard tickets, family tickets, and special event tickets. Make sure to select the appropriate date and time for your visit.

2. Hours of Operation: The studio tour's hours of operation can vary, but generally, it is open every day except for a few major holidays. The tour typically opens in the morning and closes in the evening. Be sure to check the official website for the most up-to-date information on opening and closing times for the specific date you plan to visit.

3. Cost: The cost of tickets can vary based on factors such as age, time of visit, and any special events. Standard ticket prices may start around £47 for adults and £39 for children (ages 5-15). Children under 5 usually have free admission, but you still need to book a ticket for them. Family and group discounts may also be available.

4. Getting There: The Harry Potter Studio Tour is located at Leavesden Studios in London. The address is: Warner Bros. Studio Tour London Studio Tour Drive Leavesden WD25 7LR United Kingdom

You can get to the studio via public transport, including train and bus options. You can also drive to the studio, and there is ample parking available on-site for a fee.

5. What to Expect: The studio tour offers an immersive experience where you can explore the actual sets, costumes, props, and other behind-the-scenes elements from the Harry Potter films. You'll get to see iconic locations like the Great Hall, Diagon Alley, the Forbidden Forest, Platform 9¾, and more. There are interactive exhibits and displays that offer insights into the filmmaking process. You can also enjoy Butterbeer and shop for souvenirs at the gift shop.

6. Tips:

• Book your tickets well in advance to secure your preferred date and time.
• Arrive a bit before your designated entry time to allow for check-in and security procedures.
• Cameras and photography are allowed throughout most of the tour, but there are restrictions in certain areas.
• Plan to spend several hours exploring the tour, as there's a lot to see and do.
• Consider bringing some extra money for souvenirs, as the gift shop offers a wide range of Harry Potter merchandise.

Remember to double-check all the information on the official Harry Potter Studio Tour website closer to your travel date, as details might have changed since my last update. Enjoy your magical journey through the world of Harry Potter!