Knightsbridge tube station

 was a landmark along the path where Danny Pink and Clara Oswald led a group of Coal Hill School students in their charge when London was suddenly overgrown with a fire-resistant forest in the 21st century. It was proximate to Trafalgar Square and the Natural History Museum — and the location where the Twelfth Doctor had parked the TARDIS during the crisis. At least one of its entrances was apparently on, or near, Cromwell Road. (TV: In the Forest of the Night)