Prohibited Sphere Megastore

The Prohibited Sphere Megastore was a comic book store in London. Boneless had been pulling customers into the comic books in the store. The Twelfth Doctor and Clara Oswald visited the store to find the cause of mysterious energy fluctuations and disappearing people. Both Luke and a female clerk were working there, and explained what had happened. When the Boneless escaped the comic books, the store was partly destroyed. (COMIC: The Fourth Wall)

Behind the scenes
The store appears to be modelled after the real life Forbidden Planet megastore on Shaftesbury Avenue in London (said store was also referenced in In Search of Doctor X).