1. Visit the Warner Bros. Studio Tour London website: https://www.wbstudiotour.co.uk/
2. Scroll down and click on "Shop Now" under the "Warner Bros. Studio Tour London Shop" section.
3. This will take you to the official Warner Bros. Studio Store website.
4. Browse the available merchandise, including apparel, souvenirs, toys, collectibles, and more.
5. Select the items you want to purchase and add them to your shopping bag.
6. Once you've added all your desired items, click on the "Checkout" button.
7. Enter your shipping address, contact information, and payment details.
8. Review your order summary and make sure everything is correct.
9. Accept the terms and conditions, and then click on the "Place Order" button to complete your purchase.
10. You will receive a confirmation email with details about your order and tracking information.