Workers stand on scaffolding underneath one of the clock faces on the Elizabeth Tower, more commonly known as Big Ben, as hands and dials are seen restored to the original Prussian blue colouring, whilst renovation works continue at the Houses of Parliament, London, Britain, September 6, 2021. REUTERS/Toby Melville

Workers stand on scaffolding underneath one of the clock faces on the Elizabeth Tower, more commonly known as Big Ben, as hands and dials are seen restored to the original Prussian blue colouring, whilst renovation works continue at the Houses of Parliament, London, Britain, September 6, 2021. REUTERS/Toby Melville

Workers stand on scaffolding underneath one of the clock faces on the Elizabeth Tower - more commonly known as Big Ben - as hands and dials are seen restored to the original Prussian blue colouring, whilst renovation works continue at the Houses of Parliament, London, Britain, September 6, 2021. REUTERS/Toby Melville

Men walk past the fallen scaffolding outside their hotel rooms in the aftermath of Hurricane Ida in Houma, Louisiana, U.S., August 30, 2021. REUTERS/Adrees Latif

Siblings watch as men move the scaffolding that fell on top of a vehicle outside of a hotel in the aftermath of Hurricane Ida in Houma, Louisiana, U.S., August 30, 2021. REUTERS/Adrees Latif

Siblings look at the scaffolding that fell on top of their family vehicle which was parked outside the hotel where they were taking shelter in the aftermath of Hurricane Ida in Houma, Louisiana, U.S., August 30, 2021. REUTERS/Adrees Latif

A Skanska contractor descends construction scaffolding on the Sixth Street Viaduct replacement project in Downtown Los Angeles, California, U.S., August 11, 2021. REUTERS/Bing Guan

A construction worker climbs scaffolding for the Automated People Mover (APM) airport transport system currently under construction as part of the Landside Access Modernization Program (LAMP), at Los Angeles International Airport in the Westchester neighborhood of Los Angeles, California, U.S. August 10, 2021. REUTERS/Bing Guan

Scaffoldings for the spectator seats are seen at Aomi Urban Sports Park, ahead of the opening of the 2020 Tokyo Olympic Games that have been postponed to 2021 due to the coronavirus disease (COVID-19) outbreak, in Tokyo, Japan July 8, 2021. REUTERS/Issei Kato

Construction workers are seen next to a scaffoldings for the spectator seats at Aomi Urban Sports Park, ahead of the opening of the 2020 Tokyo Olympic Games that have been postponed to 2021 due to the coronavirus disease (COVID-19) outbreak, in Tokyo, Japan July 8, 2021. REUTERS/Issei Kato

Workers stand on scaffolding outside Centre Block on Parliament Hill in Ottawa, Ontario, Canada June 16, 2021. REUTERS/Patrick Doyle

Workers on a scaffolding build rock support on Bar-Boljare highway in Gornje Mrke, Montenegro May 27, 2021. A Chinese loan for the first phase of a highway linking the Adriatic Sea port of Bar and border with Serbia has sent Montenegro's debt soaring and forced the country to seek help from the European Union. Picture taken on May 27, 2021. REUTERS/Stevo Vasiljevic

Birds sit on scaffoldings of the St. Patrick's Cathedral, with the rain clouds in the backdrop, after a thunderstorm, as Cyclone Tauktae passed coastal areas in Karachi, Pakistan May 18, 2021. REUTERS/Akhtar Soomro

Scaffolder Frank Greene brews tea at the Peterborough Cafe as people are allowed to eat and drink inside once again as the coronavirus disease (COVID-19) restrictions continue to ease, in Fulham, London, Britain May 18, 2021. REUTERS/Kevin Coombs

Scaffolder Frank Greene brews tea at the Peterborough Cafe as people are allowed to eat and drink inside once again as the coronavirus disease (COVID-19) restrictions continue to ease, in Fulham, London, Britain May 18, 2021. REUTERS/Kevin Coombs

Scaffolder Danny Lumley eats sausage, chips, bacon, egg and beans for breakfast at the Peterborough Cafe as people are allowed to eat and drink inside once again as the coronavirus disease (COVID-19) restrictions continue to ease, in Fulham, London, Britain May 18, 2021. REUTERS/Kevin Coombs

Scaffolder Frank Greene drinks tea at the Peterborough Cafe as people are allowed to eat and drink inside once again as the coronavirus disease (COVID-19) restrictions continue to ease, in Fulham, London, Britain May 18, 2021. REUTERS/Kevin Coombs

Scaffolder Frank Greene reads a newspaper at the Peterborough Cafe as people are allowed to eat and drink inside once again as the coronavirus disease (COVID-19) restrictions continue to ease, in Fulham, London, Britain May 18, 2021. REUTERS/Kevin Coombs

Scaffolder Danny Lumley eats sausage, chips, bacon, egg and beans for breakfast at the Peterborough Cafe as people are allowed to eat and drink inside once again as the coronavirus disease (COVID-19) restrictions continue to ease, in Fulham, London, Britain May 18, 2021. REUTERS/Kevin Coombs

Scaffolder Danny Lumley eats sausage, chips, bacon, egg and beans for breakfast at the Peterborough Cafe as people are allowed to eat and drink inside once again as the coronavirus disease (COVID-19) restrictions continue to ease, in Fulham, London, Britain May 18, 2021. REUTERS/Kevin Coombs

Construction scaffolding covers part of the plaza in front of the U.S. Supreme Court building in Washington, U.S. May 17, 2021. REUTERS/Jonathan Ernst

An official walks past scaffoldings for the spectators' seats at the Tokyo 2020 Olympics Cycling BMX test event at Ariake Urban Sports Park in Tokyo, Japan May 17, 2021. REUTERS/Issei Kato

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

A worker removes scaffolding at the house under construction in Dakar, Senegal May 4, 2021. Picture taken May 4, 2021. REUTERS/Zohra Bensemra

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