A woman wearing a face protective mask is seen at a bus stop with a public health campaign advertisement asking for passengers to wear masks on public transport, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 17, 2020. REUTERS/Toby Melville

A woman wearing a protective face mask is seen at a bus stop with a public health campaign advertisement asking for passengers to wear masks on public transport, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 17, 2020. REUTERS/Toby Melville

A public health campaign advertisement is seen on the BT Tower in London, as the spread of the coronavirus disease (COVID-19) continues, London, Britain, April 17, 2020. REUTERS/Toby Melville

A public health campaign advertisement is seen on the BT Tower in London, as the spread of the coronavirus disease (COVID-19) continues, London, Britain, April 17, 2020. REUTERS/Toby Melville

A public health campaign advertisement is seen on a newspaper in London, as the spread of the coronavirus disease (COVID-19) continues, London, Britain, April 17, 2020. REUTERS/Toby Melville

A man in a protective face mask walks past a British government public health campaign advertisement at Victoria underground station, as the number of coronavirus (COVID-19) cases grow around the world, London, Britain, March 15, 2020. REUTERS/Toby Melville

A visitor walks past a public information campaign advertisement during the annual conference of the British Chambers of Commerce in London, Britain, March 5, 2020. REUTERS/Toby Melville

Delegates walk past a public information campaign advertisement during the annual conference of the British Chambers of Commerce in London, Britain, March 5, 2020. REUTERS/Toby Melville

A visitor walks past a public information campaign advertisement during the annual conference of the British Chambers of Commerce in London, Britain, March 5, 2020. REUTERS/Toby Melville

A digital hoarding in southwest London displays an advert for Shell?s "drive carbon neutral" campaign, which is being investigated by Britain?s Advertising Standards Authority (ASA), in London, Britain March 1, 2020. Picture taken March 1, 2020. REUTERS/Matthew Green

Soccer Football - Premier League - Burnley v Manchester City - Turf Moor, Burnley, Britain - December 3, 2019 General view of advertising boards in support of the Stonewall Rainbow Laces campaign during the match Action Images via Reuters/Carl Recine EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

A truck with an advertisement for U.S. President Donald Trump sits outside a campaign town hall meeting with Democratic 2020 U.S. presidential candidate and U.S. Senator Elizabeth Warren (D-MA) in Newport, New Hampshire, U.S., October 24, 2019. REUTERS/Brian Snyder

A poster with information for British people on how to live and work in France after Brexit, which is a part of the advertising campaign 'Get ready for Brexit', is displayed in Paris, France, October 17, 2019. REUTERS/Charles Platiau

A poster with information for British people on how to live and work in France after Brexit, which is a part of the advertising campaign 'Get ready for Brexit', is displayed in Paris, France, October 17, 2019. REUTERS/Charles Platiau

An electronic billboard displaying a British government Brexit information awareness campaign advertisement is seen in London, Britain, September 11, 2019. REUTERS/Toby Melville

An electronic billboard displaying a British government Brexit information awareness campaign advertisement is seen in London, Britain, September 11, 2019. REUTERS/Toby Melville

An electronic billboard displaying a British government Brexit information awareness campaign advertisement is seen near construction cranes in London, Britain, September 11, 2019. REUTERS/Toby Melville.

A cyclist rides past an electronic billboard displaying a British government Brexit information awareness campaign advertisement in London, Britain, September 11, 2019. REUTERS/Toby Melville.

A bus passes an electronic billboard displaying a British government Brexit information awareness campaign advertisement in London, Britain, September 11, 2019. REUTERS/Toby Melville.

A man passes an electronic billboard displaying a British government Brexit information awareness campaign advertisement in London, Britain, September 11, 2019. REUTERS/Toby Melville.

A bus passes an electronic billboard displaying a British government Brexit information awareness campaign advertisement in London, Britain, September 11, 2019. REUTERS/Toby Melville.

A bus passes an electronic billboard displaying a British government Brexit information awareness campaign advertisement in London, Britain, September 11, 2019. REUTERS/Toby Melville.

A bus passes an electronic billboard displaying a British government Brexit information awareness campaign advertisement in London, Britain, September 11, 2019. REUTERS/Toby Melville.

A bus passes an electronic billboard displaying a British government Brexit information awareness campaign advertisement in London, Britain, September 11, 2019. REUTERS/Toby Melville.

An electronic billboard displays a British government Brexit information awareness campaign advertisement in west London, Britain, September 11, 2019. REUTERS/Toby Melville

An electronic billboard displays a British government Brexit information awareness campaign advertisement in west London, Britain, September 11, 2019. REUTERS/Toby Melville

An electronic billboard displays a British government Brexit information awareness campaign advertisement in west London, Britain, September 11, 2019. REUTERS/Toby Melville

Advertising campaign to boycott Japanese products are hang where Japanese goods used to be on display, at a market in Seoul, South Korea, July 20, 2019. The banner reads "We don't sell Japanese products". REUTERS/Heo Ran

A campaign advertising of Rakuten Pay, a QR code mobile payment system operated by Rakuten, is displayed at a coffee shop in Tokyo, Japan May 30, 2019. Picture taken May 30, 2019. REUTERS/Issei Kato

A campaign advertising of Rakuten Pay, a QR code mobile payment system operated by Rakuten, is displayed at a coffee shop in Tokyo, Japan May 30, 2019. Picture taken May 30, 2019. REUTERS/Issei Kato

An advertisement is put on a wall ahead of Britain's Secretary of State for International Development Rory Stewart's launch of his campaign for the Conservative Party leadership, in London, Britain June 11, 2019. REUTERS/Henry Nicholls

A screen shows an image of Kazakh President and candidate Kassym-Jomart Tokayev, which is part of his campaign ahead of the upcoming presidential election, in Almaty, Kazakhstan June 3, 2019. REUTERS/Pavel Mikheyev

A screen shows an image of Kazakh President and candidate Kassym-Jomart Tokayev, which is part of his campaign ahead of the upcoming presidential election, in Almaty, Kazakhstan June 3, 2019. REUTERS/Pavel Mikheyev

Brazil's Minister of the Secretariat of Government Santos Cruz is seen before a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado

Brazil's President Jair Bolsonaro and Economy Minister Paulo Guedes attend a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado

Brazil's President Jair Bolsonaro gestures during a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado

Brazil's President Jair Bolsonaro attends a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado

Brazil's Justice Minister Sergio Moro is seen before ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado

Brazil's President Jair Bolsonaro attends a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado

Brazil's President Jair Bolsonaro attends a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado

Brazil's President Jair Bolsonaro listens to Chief of Staff Minister Onyx Lorenzoni during a ceremony to presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado

Brazil's Secretary of Social Security Rogerio Marinho is seen before ceremony to presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado

Soccer Football - Premier League - Brighton & Hove Albion v Crystal Palace - The American Express Community Stadium, Brighton, Britain - December 4, 2018 General view as the advertising boards are in colours in support of the Stonewall Rainbow Laces campaign REUTERS/Toby Melville EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Soccer Football - Premier League - Brighton & Hove Albion v Crystal Palace - The American Express Community Stadium, Brighton, Britain - December 4, 2018 General view as the advertising boards display a message in support of the Stonewall Rainbow Laces campaign REUTERS/Toby Melville EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

German Minister for Family, Pensioners and Youth Franziska Giffey holds an advertising campaign block for a Kindergarden law at the weekly cabinet while in Berlin, Germany, September 19, 2018. REUTERS/Fabrizio Bensch

A man tears an advertising campaign featuring leftist front-runner Andres Manuel Lopez Obrador (L) of the National Regeneration Movement (MORENA) alongside Latin American leaders Hugo Chavez and Lula in Mexico City, Mexico April 25, 2018. REUTERS/Ginnette Riquelme

A man walks by a bus featuring an advertising campaign with leftist front-runner Andres Manuel Lopez Obrador (L) of the National Regeneration Movement (MORENA) alongside Latin American leaders Hugo Chavez and Lula in Mexico City, Mexico April 25, 2018. REUTERS/Ginnette Riquelme

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas stand with activists as they pose at the launch of the Peoples Vote advertising campaign in central London, Britain April 15, 2018. REUTERS/Simon Dawson

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas pose in front of a poster to launch the Peoples Vote advertising campaign in London, Britain April 15, 2018. REUTERS/Simon Dawson

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas stand with activists as they pose at the launch of the Peoples Vote advertising campaign in central London, Britain April 15, 2018. REUTERS/Simon Dawson

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas pose in front of a poster to launch the Peoples Vote advertising campaign in London, Britain April 15, 2018. REUTERS/Simon Dawson

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas pose in front of a poster to launch the Peoples Vote advertising campaign in London, Britain, April 15, 2018. REUTERS/Simon Dawson

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas stand with activists as they pose at the launch of the Peoples Vote advertising campaign in central London, Britain April 15, 2018. REUTERS/Simon Dawson

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas pose in front of a poster to launch the Peoples Vote advertising campaign in London, Britain, April 15, 2018. REUTERS/Simon Dawson

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas stand with activists as they pose at the launch of the Peoples Vote advertising campaign in London, Britain, April 15, 2018. REUTERS/Simon Dawson

Buses drive past a board, which advertises the campaign of candidate in the upcoming presidential election Ksenia Sobchak, in a street in Krasnoyarsk, Russia March 12, 2018. REUTERS/Ilya Naymushin

Cars drive past a billboard advertising the campaign of Pavel Grudinin, candidate of the Russian Communist Party in the upcoming presidential election, in Krasnoyarsk, Russia March 11, 2018. REUTERS/Ilya Naymushin

A multi-sided transformable board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, is on display in a street in Stavropol, Russia March 5, 2018. REUTERS/Eduard Korniyenko TPX IMAGES OF THE DAY

A multi-sided transformable board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, is on display in a street in Stavropol, Russia March 5, 2018. REUTERS/Eduard Korniyenko

A multi-sided transformable board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, is on display in a street in Stavropol, Russia March 5, 2018. REUTERS/Eduard Korniyenko