Today Warner Bros. Studio Tour London – The Making of Harry Potter has offered a sneak peek at its biggest expansion to date, Gringotts Wizarding Bank.

From the brass leaf details on the columns to polishing the Sword of Gryffindor, finishing touches are currently taking place to ensure that the wizard’s bank is ready for the official opening on Saturday, April 6. Entering this impressive set, visitors are invited to step into the grand banking hall, underneath the magnificent ‘crystal’ chandeliers to discover the secrets behind goblin prosthetics, costumes and much more. From concept art and prop making to set design and prosthetics, visitors will unlock the filmmaking magic behind the famous wizards' bank.

Lined by towering marble pillars, the grand banking hall will be decorated with three magnificent crystal chandeliers and finished with real brass leaf. Inkwells, quills, ledgers and piles of Galleons, Sickles and Knuts will complete the goblin tellers’ desks as seen on screen. The Prop-making Department, led by Pierre Bohanna, created over 210,000 coins for the final two films alone.

Gringotts Wizarding Bank is famously run by goblins. Walking through the imposing marble columns, visitors will discover the costumes and prosthetics belonging to Bogrod, Griphook and many other goblin bankers. Each prosthetic mask took weeks to create, with every hair individually inserted and veins painstakingly painted by hand. It took four hours to transform actor Warwick Davis into Griphook in the films which included him wearing black contact lenses and dentures with extremely sharp teeth to complete the goblin look.

Once through the banking hall of Gringotts, visitors will enter the depths of the Lestrange Vault used to store the treasures of Bellatrix Lestrange including the Sword of Gryffindor and Helga Hufflepuff’s Cup, one of Voldemort’s many Horcruxes. During filming 38,000 pieces of rubberised treasure were created for the Lestrange vault including 7,014 Hufflepuff Cups. Here, visitors can try out a unique photo opportunity allowing them to step inside the Lestrange vault and surround themselves with treasure.

Officially opening on Saturday, April 6, the 16,500sqft Gringotts Wizarding Bank expansion will be the Studio Tour’s biggest addition to date and has been designed and built by many of the original crew members who worked on the hugely successful magical film series including Oscar and BAFTA winning Production Designer Stuart Craig, Construction Manager Paul Hayes and Head Propmaker Pierre Bohanna.