A police officer in a helmet stands on a scaffolding as activists stretch a banner at the spray painted side of Euston station building to protest against the HS2 high-speed railway in London, Britain May 6, 2021. REUTERS/Henry Nicholls

Scaffolding under a vault is pictured at the reconstruction site during French President Emmanuel Macron's visit at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS

A workman stands on scaffolding under a vault at the reconstruction site during French President Emmanuel Macron's visit at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS

A workman stands on scaffolding under the vault at the reconstruction site during French President Emmanuel Macron's visit at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS

French President Emmanuel Macron (C), Mayor of Paris Anne Hidalgo (R) and the French Army General Jean-Louis Georgelin tour the scaffolding under the vault at the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS

French President Emmanuel Macron looks at the damaged vaults from a scaffolding during a visit at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS

French President Emmanuel Macron speaks with the French Army General Jean-Louis Georgelin and looks at the damaged vaults from a scaffolding during a visit at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS

A scaffolder works under the vaults at the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS

Workers stand on a scaffolding under the vaults at the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS

A general view of the main scaffolding under the vaults at the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS

Workers stand on scaffolding at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. REUTERS/Benoit Tessier/Pool

Scaffolding at the reconstruction site at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. REUTERS/Benoit Tessier/Pool

A crane and scaffolding at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. REUTERS/Benoit Tessier/Pool

A worker walks on scaffolding at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. REUTERS/Benoit Tessier/Pool

Workers stand on scaffolding at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. REUTERS/Benoit Tessier/Pool

Workers erect a scaffolding at Donghua Gate at the Forbidden City following an outbreak of the coronavirus disease (COVID-19) in Beijing, China, April 14, 2021. REUTERS/Thomas Peter

Workers set up scaffolds on the facade of a hotel, amid the coronavirus disease (COVID-19) outbreak, in Athens, Greece, March 30, 2021. REUTERS/Alkis Konstantinidis

Scaffolding is seen outside a tourist shop in Leysdown-on-Sea, on the Isle of Sheppey, Britain, March 15, 2021. Picture taken March 15, 2021. To match Special Report HEALTH-CORONAVIRUS/UK-VARIANT REUTERS/Dylan Martinez

A worker stands on a scaffolding as he fixes a building damaged by Beirut blast, in Beirut Lebanon March 11, 2021. Picture taken March 11, 2021. REUTERS/Mohamed Azakir

Wrokers stand on a scaffolding as they fix a building damaged by Beirut blast, in Beirut, Lebanon March 11, 2021. Picture taken March 11, 2021. REUTERS/Mohamed Azakir

A supporter of U.S. President Donald Trump is detained by law enforcement on a scaffolding, during a protest against the certification of the 2020 presidential election results by the Congress, at the Capitol in Washington, U.S., January 6, 2021. Picture taken January 6, 2021. REUTERS/Jim Urquhart

Supporters of U.S. President Donald Trump gain access to scaffolding near the steps of the Capitol building during a "Stop the Steal" protest outside of the Capitol building in Washington D.C. U.S. January 6, 2021. Picture taken January 6, 2021. REUTERS/Stephanie Keith

Pro-Trump protesters climb scaffolding as they attempt to storm the U.S. Capitol during a rally to contest the certification of the 2020 U.S. presidential election results by the U.S. Congress, in Washington, U.S, January 6, 2021. REUTERS/Shannon Stapleton

Pro-Trump protesters climb scaffolding as they attempt to storm the U.S. Capitol during a rally to contest the certification of the 2020 U.S. presidential election results by the U.S. Congress, in Washington, U.S, January 6, 2021. REUTERS/Shannon Stapleton

Supporters of U.S. President Donald Trump climb a scaffolding in front of the U.S. Capitol Building in Washington, U.S., January 6, 2021. REUTERS/Leah Millis

Supporters of U.S. President Donald Trump climb a scaffolding in front of the U.S. Capitol Building in Washington, U.S., January 6, 2021. REUTERS/Leah Millis

Workers on scaffolding build an ice structure at the site of the Harbin International Ice and Snow Festival before its opening in Harbin, China, December 16, 2020. REUTERS/Carlos Garcia Rawlins SEARCH "HARBIN RAWLINS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Restoration workers scale scaffolding outside Centre Block on Parliament Hill in Ottawa, Ontario, Canada December 2, 2020. REUTERS/Blair Gable

Scaffolding fills the House of Commons in Centre Block as restoration work continues on Parliament Hill in Ottawa, Ontario, Canada December 2, 2020. REUTERS/Blair Gable

Residents wait for rescuers on top of a scaffolding inside a submerged village following floods caused by Typhoon Vamco, in Marikina, Metro Manila, Philippines, November 12, 2020. REUTERS/Eloisa Lopez

A sign is displayed on scaffolding as part of remembrance commemorations in Newcastle upon Tyne, Britain, November 4, 2020. REUTERS/Lee Smith

Workers are seen on scaffoldings at a construction site of a residential compound in Beijing, China October 19, 2020. REUTERS/Tingshu Wang

A worker is seen on scaffoldings at a construction site of a residential compound in Beijing, China October 19, 2020. REUTERS/Tingshu Wang

A supporter of the Pakistan Democratic Movement (PDM), an alliance of political opposition parties, sits on a scaffolding and waves a flag as he listens to their leaders during an anti-government protest rally in Karachi, Pakistan October 18, 2020. REUTERS/Akhtar Soomro

Construction workers set up scaffolding in front of shops at Wangfujing shopping street in Beijing, China October 14, 2020. REUTERS/Florence Lo

Workers are seen standing on a scaffolding guiding a crane carrying a slab of concrete on top of a building under construction, amid the coronavirus disease (COVID-19) outbreak, in Dublin, Ireland October 1, 2020. Picture taken October 1, 2020. REUTERS/Clodagh Kilcoyne

Workers are seen standing on the scaffolding of a building at a construction site, amid the coronavirus disease (COVID-19) outbreak, in Dublin, Ireland October 1, 2020. Picture taken October 1, 2020. REUTERS/Clodagh Kilcoyne

Workers are seen standing on the scaffolding of a building at a construction site, amid the coronavirus disease (COVID-19) outbreak, in Dublin, Ireland October 1, 2020. Picture taken October 1, 2020. REUTERS/Clodagh Kilcoyne

Workers erect a scaffolding above a giant poster advertising dental aligners of Swiss manufacturer bestsmile at a construction site in Zurich, Switzerland September 30, 2020. REUTERS/Arnd Wiegmann

A worker carries a scaffolding pole at the National Speed Skating Oval, known colloquially as the "Ice Ribbon", which will host the 2021 World Speed Skating Championships and the speed skating competitions at the 2022 Winter Olympics in Beijing, China, September 23, 2020. REUTERS/Thomas Peter

A worker carries a scaffolding pole at the National Speed Skating Oval, known colloquially as the "Ice Ribbon", which will host the 2021 World Speed Skating Championships and the speed skating competitions at the 2022 Winter Olympics in Beijing, China, September 23, 2020. REUTERS/Thomas Peter

A boy climbs a scaffolding at the Hansen family farm, where members of the Hillbilly Brigade, a group of some 1,200 men and women who spontaneously came together to fight fires, and firefighters from all over came to rest and eat the donations provided from the community, during their work in the aftermath of the Riverside Fire near Molalla, Oregon, U.S., September 16, 2020. Picture taken September 16, 2020. REUTERS/Shannon Stapleton

Children sit on a scaffolding at the Hansen family farm, where members of the Hillbilly Brigade, a group of some 1,200 men and women who spontaneously came together to fight fires, and firefighters from all over came to rest and eat the donations provided from the community, during their work in the aftermath of the Riverside Fire near Molalla, Oregon, U.S., September 16, 2020. Picture taken September 16, 2020. REUTERS/Shannon Stapleton

The logo of clothing company Camaieu is seen behind a scaffolding on a closed shop in Olomouc, Czech Republic, September 8, 2020. Picture taken September 8, 2020. REUTERS/David W Cerny

The logo of clothing company Camaieu is seen behind a scaffolding on a closed shop in Olomouc, Czech Republic, September 8, 2020. Picture taken September 8, 2020. REUTERS/David W Cerny

A man sits on a scaffolding in front of a closed Camaieu clothing store in Olomouc, Czech Republic, September 8, 2020. Picture taken September 8, 2020. REUTERS/David W Cerny

A street is covered in scaffolding in the financial district during the coronavirus disease (COVID-19) pandemic in the Manhattan borough of New York City, New York, U.S., September 9, 2020. Picture taken September 9, 2020. REUTERS/Carlo Allegri

People sit outside a restaurant under a scaffolding in the financial district as the spread of the coronavirus disease (COVID-19) continues in Frankfurt, Germany, September 8, 2020. REUTERS/Kai Pfaffenbach

Volunteers carry scaffolding to be set up around a building that was damaged by an explosion at the Beirut port, in the neighbourhood of Karantina, Beirut, Lebanon, August 13, 2020. REUTERS/Alkis Konstantinidis SEARCH "KARANTINA NEIGHBOURHOOD" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A worker stands on scaffolding outside a sorority house in the Greek Row area at the University of Washington in Seattle, Washington, U.S. August 5, 2020. Picture taken August 5, 2020. REUTERS/Lindsey Wasson

A scaffolder works on a new Barratt Homes housing development near Warrington, Britain, August 6, 2020. REUTERS/Phil Noble

A scaffolder works on a new Barratt Homes housing development near Warrington, Britain, August 6, 2020. REUTERS/Phil Noble

A construction worker carries a scaffold pole on the roof of a house in London, Britain August 3, 2020. REUTERS/Kevin Coombs

A builder stands on a scaffolding as he works on a terraced house in Oldham, as the town faces local restrictions in an effort to avoid a local lockdown being forced upon the area amid the coronavirus disease (COVID-19) outbreak, Britain July 30, 2020. REUTERS/Phil Noble

A builder stands on a scaffolding as he works on a terraced house in Oldham, as the town faces local restrictions in an effort to avoid a local lockdown being forced upon the area amid the coronavirus disease (COVID-19) outbreak, Britain July 30, 2020. REUTERS/Phil Noble

A builder stands on a scaffolding as he works on a terraced house in Oldham, as the town faces local restrictions in an effort to avoid a local lockdown being forced upon the area amid the coronavirus disease (COVID-19) outbreak, Britain July 30, 2020. REUTERS/Phil Noble

A New York Police Department (NYPD) officer works at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

A New York Police Department (NYPD) officer works at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

New York Police Department (NYPD) officers work at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly

A New York Police Department (NYPD) officer works at the scene of a scaffolding collapse near the corner of Lexington Avenue and East 36th Street in Manhattan, New York City, U.S., July 16, 2020. REUTERS/Andrew Kelly