Nicola Mendelsohn, Facebook's Vice-President for Europe, the Middle East and Africa poses for a portrait at Facebook's headquarters in London, Britain, December 4, 2017.
People write messages next to a slogan at Facebook's headquarters in London, Britain, December 4, 2017.
Seat labels are seen at Facebook's headquarters in London, Britain, December 4, 2017.
A giant logo is seen at Facebook's headquarters in London, Britain, December 4, 2017.
The building pass return is seen at Facebook's headquarters in London, Britain, December 4, 2017.
People walk through the lobby at Facebook's headquarters in London, Britain, December 4, 2017.
Britain's Chancellor of the Exchequer Philip Hammond arrives at Facebook's headquarters in London, Britain, December 4, 2017.
People stand in front of a logo at Facebook's headquarters in London, Britain, December 4, 2017.
A woman waits for an elevator in front of a logo at Facebook's headquarters in London, Britain, December 4, 2017.
Printed slogans are tacked to a wall at Facebook's headquarters in London, Britain, December 4, 2017.
A woman carries an Instagram branded bag at Facebook's headquarters in London, Britain, December 4, 2017.
People write messages next to a slogan at Facebook's headquarters in London, Britain, December 4, 2017.
Balloons are seen in front of a logo at Facebook's headquarters in London, Britain, December 4, 2017.
A man wearing a branded sweatshirt eats at Facebook's headquarters in London, Britain, December 4, 2017.
A man waits for an elevator in front of a logo at Facebook's headquarters in London, Britain, December 4, 2017.
A giant logo is seen at Facebook's headquarters in London, Britain, December 4, 2017. Reuters/Toby Melville
Sneak peek inside Facebook's London office
