Police officers are seen standing outside a shop on Oxford Street in central London on April 19, 2019, during a police operation at the climate change activists encampment blockading Oxford Circus on the fifth day of an environmental protest by the Extinction Rebellion group. Undeterred by over 400 arrests, climate change activists continued their demonstration into a fifth day in London with a small protest at the country’s main Heathrow Airport, along with the ongoing protest camps at other iconic locations around the British capital.