Several cordons were placed around the base of the building, with train passengers leaving nearby London Bridge station being diverted to other exits. At 6.50am, Lockwood posted a photo on his Facebook page. Topless and barefoot, he wore a head-mounted camera as he balanced 1,000 feet above London. Scotland Yard later confirmed that three men had been arrested, one on suspicion of trespassing and two on suspicion of causing a public nuisance. All remained in custody on Monday night. Lockwood, from Manchester, has scaled some of the tallest buildings and structures in the world, hanging from the rafters of the San Siro stadium in Milan, doing pull-ups from a 1,115ft beam at a power station in Croatia and posing as a worker to climb a crane 1,200 feet in Dubai. He refuses to use safety systems, relying solely on his grip and upper body strength to stop his fall.

“My brain is blank, my heart rate is not going up”

He once revealed that during such climbs, “my brain goes blank, my heart rate doesn’t go up, and I feel almost peaceful.” On July 31, he posted a cryptic message on Facebook: “I’m working on something that actually scares me a little just thinking about it, I can’t wait.” Then on August 16, as he prepared for his death-defying stunt, he appeared to hint that it could go terribly wrong. He wrote that before leaving the planet he wanted to say just one thing. “No matter how outrageous your passion or goal or dream may be, don’t let anyone, no family, no friends, no government, no establishment, absolutely no one, stop you from pursuing (sic) what you want to do, no matter how hard, scary, stupid, or dangerous it seems to other people,” he wrote.