In this video, Robert seems to be nearly halfway up the building as someone is heard in the background telling people on the street to back up.
Alain Robert scrambled up the side of the 46-story Heron Tower as police cordoned off the building, closed roads and ushered away spectators, according to the Associated Press.
Urban climber dubbed the French Spiderman, Alain Robert scales the outside of Heron Tower building in the City of London, Thursday, Oct. 25, 2018.
We caught up with French Spiderman Alain Robert before he started a surprise 754ft (230m) climb in the City of London. Follow the climb live here:
60 دقيقة مثيرة مع سبايدر مان الفرنسي في #لندن
✍️ دون الحصول على تصريح للتسلق ودون حبال ولا قفزات لحماية يديه قرر المتسلق الفرنسي آلان روبرت خوض المغامرة وتسلق برج هيرون الأعلى في لندن. #لندن #تسلق #برج ⬅️
Why Mr. Robert decided to scale the tower was not immediately clear, but it was far from the first time that the 56-year-old French stuntman has scurried up the side of a skyscraper.
French Spiderman Alain Robert scaled one of London’s tallest buildings without ropes
And on video that seems to be taken from inside the Heron Tower, people watched bewilderedly as Robert at one point took his foot off the building and shook it.
Alain Robert, who is known as the French Spider-Man, has also climbed the Eiffel Tower, the Empire State Building, and the New York Times building, among others
A man who calls himself the "French Spider-Man" illegally scaled one of London's tallest buildings without any ropes or safety gear on Thursday and was promptly arrested.
"While the incident has caused immense disruption to everyday business in the City of London, it also posed a significant level of risk to the safety of people in and around Heron Tower at the time."
Daredevil climber Alain Robert, dubbed the French Spiderman, scales the outside of the Heron Tower in London 📷: @KirstyOConnor_ - see more at
Heron Tower is over 200 metres high.
In images shared on social media, onlookers could be seen stretching their necks to get a glimpse of the climber, Alain Robert, as he ascended the imposing building, which is more than 750 feet tall.