https://youtu.be/YjNt_8qeLD8
In this commercial for headphones, a young woman dances in an eerily empty Piccadilly Circus, London's famously crowded tourist attraction. The creative director of the ad explains how it was done:
"We never quite believed we would actually be able to lock down central London in such heavily populated and high security areas," Grey London executive creative director Dominic Goldman tells AdFreak. "We used a helicopter for the ariel shots, which had understandably strict airspace rules. We held back traffic and people for a few minutes each take. This wasn't easy to produce. Most of this was captured in camera with minimal clean-up in post."