A couple staying on the 40th floor of The Shard said they spotted a barefoot climber ascending the London skyscraper on Sunday morning.
Paul Curphey spotted Adam Lockwood climbing the 72-storey building, which houses apartments, a hotel and offices, at 6am when they saw him waving and climbing past the window of Curphey and his partner Treasaidh.
Lockwood posted a photo on his Facebook account from the top of the famous “shard of glass” tower near London Bridge, and has previously received publicity for climbing a crane in Dubai and the San Siro football stadium in Milan.
Curphey said the couple, who were visiting London for an anniversary trip, were lying in bed when they saw someone waving at the window.
“The climber was shouting festively,” the 52-year-old Isle of Man businessman told the PA news agency.
“He appeared, waving at the window, 40 floors up, already in the deep end so to speak. We couldn’t help urging him to carry out his mission.
“He was smiling, waving and having fun like never before.
“(My) partner thought I had pulled out all the stops and managed to convince a guy to bring a box of Milk Tray for his birthday.”
Curphey added that the climber had a “happy demeanor”.
“It was scary to watch, but her cheerful demeanor was incredibly uplifting.”
The Metropolitan Police were called to the 1,017ft (310m) skyscraper at 5.38am. The London Fire Brigade and London Ambulance Service were also present.
Three men were arrested. One, a 21-year-old man believed to be Lockwood, was arrested on suspicion of trespassing and two others were detained on suspicion of causing a public nuisance.
In October 2019, George King-Thomson was jailed for six months after breaking an injunction and climbing the Shard. No criminal charges were brought by the Met, but instead a case was brought by Real Estate Management Ltd who manage the building. Greenpeace activists have tried to scale it before.