From 11am to 4pm the two cabs and a bellboy descended on the tourist destination to provide passers-by with a taste of Subway's new beef pastrami melt sub sandwich.
People were also able to hop into the cabs, which offered a virtual reality (VR) experience. Those who donned the VR headsets were treated to a 360-degree tour around the US city that inspired the new sub.
Subway promoted the stunt via the hashtags #BeMoreNY and #StayPicky.
More stunts on the Southbank:
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