Apple TV's "Slow Horses" starring Gary Oldman, pictured, has transformed London's less glamorous spots into popular tourist hotspots. Director Adam Randall says the show is "really about London and what London's really like." - AppleTV
Apple TV's "Slow Horses" starring Gary Oldman, pictured, has transformed London's less glamorous spots into popular tourist hotspots. Director Adam Randall says the show is "really about London and what London's really like." - AppleTV

Walking down a London street populated by chic wine bars, Michelin-starred restaurants and smart, Victorian buildings, a group of tourists suddenly halts in its tracks.

They're ignoring the appealing surroundings. Instead, they're peering through an iron gate leading to a far-less-appealing alleyway where a row of garbage cans flanks a fire escape staircase, leading into a brick building.